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import { GoogleGenAI, Type } from "@google/genai"; |
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import { TECHNICAL_MANUALS } from "../shared/technical-manuals"; |
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import { storage } from "./storage"; |
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let genAIClient: GoogleGenAI | null = null; |
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function getGenAI(): GoogleGenAI | null { |
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if (!process.env.GEMINI_API_KEY) { |
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return null; |
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} |
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if (!genAIClient) { |
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genAIClient = new GoogleGenAI({ |
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apiKey: process.env.GEMINI_API_KEY, |
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httpOptions: { |
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headers: { |
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"User-Agent": "aistudio-build", |
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}, |
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}, |
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}); |
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} |
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return genAIClient; |
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} |
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// Resilient helper to execute Gemini API calls with graceful multi-model fallback and seamless offline fallback |
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async function callGeminiWithFallback<T>( |
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fn: (model: string) => Promise<T> |
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): Promise<T | null> { |
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// Try lightweight fast flash-lite first (low latency, high availability under load), then standard flash |
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const models = ["gemini-3.1-flash-lite", "gemini-3.7-flash", "gemini-flash-latest"]; |
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for (const model of models) { |
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try { |
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const res = await fn(model); |
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if (res) return res; |
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} catch (err: any) { |
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// Quietly fall through on 503/429/high demand or network blips |
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continue; |
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} |
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} |
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return null; |
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} |
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export interface DiagnosticsRequest { |
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symptoms: string; |
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deviceType?: "laptop" | "desktop" | "all" | string; |
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brand?: string; |
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model?: string; |
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os?: string; |
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category?: "hardware" | "software" | "cleaning" | "upgrades" | "all" | string; |
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errorCode?: string; |
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} |
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export interface DiagnosticResult { |
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summary: string; |
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confidence: "High" | "Medium" | "Low"; |
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recommendedCategory: "hardware" | "software" | "cleaning" | "upgrades"; |
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probableCauses: { |
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cause: string; |
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likelihood: "High" | "Medium" | "Low"; |
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explanation: string; |
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}[]; |
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stepByStepPlan: { |
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stepNumber: number; |
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title: string; |
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action: string; |
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expectedOutcome: string; |
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}[]; |
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toolsAndSoftware: string[]; |
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safetyWarnings: string[]; |
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preventativeTips: string[]; |
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isOutOfScope?: boolean; |
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} |
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export interface ChatMessage { |
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role: "user" | "assistant" | "system"; |
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content: string; |
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} |
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export interface TechnicalChatRequest { |
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messages: ChatMessage[]; |
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deviceContext?: string; |
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categoryContext?: string; |
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} |
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export interface TechnicalChatResponse { |
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message: string; |
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suggestedGuides?: { |
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id: string; |
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title: string; |
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category: string; |
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difficulty: string; |
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estimatedTime: string; |
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}[]; |
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suggestedManuals?: { |
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id: string; |
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title: string; |
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code: string; |
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category: string; |
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}[]; |
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voltageRailsMentioned?: { |
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rail: string; |
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voltage: string; |
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location: string; |
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description: string; |
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}[]; |
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quickActions?: string[]; |
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} |
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const SYSTEM_INSTRUCTION = `You are JCRGuru's expert Hardware & Computer Diagnostic Specialist. |
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Your SOLE purpose is to diagnose, troubleshoot, and provide step-by-step resolution paths for computer hardware, laptops, desktops, operating systems (Windows, macOS, Linux), peripherals, thermals, BIOS/UEFI, and electronic repairs. |
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STRICT SCOPE DIRECTIVE: |
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You ONLY assist with device diagnostics, computer repair, hardware upgrades, OS recovery, driver/firmware fixes, component testing, and cleaning. |
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If a user prompt is unrelated to computer/laptop repair or hardware maintenance (such as general conversational queries, creative writing, cooking, gaming lore, non-PC topics), set "isOutOfScope": true, give a polite 1-sentence refusal in "summary", and leave the other lists empty. |
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For valid computer repair queries, provide a highly technical, precise, and practical diagnostic analysis adhering to industry standard bench repair practices.`; |
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export async function runAIDiagnostics(reqData: DiagnosticsRequest): Promise<DiagnosticResult> { |
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const ai = getGenAI(); |
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if (!ai) { |
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return generateFallbackDiagnostics(reqData); |
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} |
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const prompt = `Diagnose the following computer/laptop issue: |
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Device Type: ${reqData.deviceType || "Laptop/Desktop"} |
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Brand/Model: ${reqData.brand || "Generic"} ${reqData.model || ""} |
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Operating System: ${reqData.os || "Any"} |
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Target Category: ${reqData.category || "Any"} |
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Reported Symptoms / Error Code: ${reqData.symptoms} ${reqData.errorCode ? `(Error code: ${reqData.errorCode})` : ""}`; |
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const result = await callGeminiWithFallback(async (modelName) => { |
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const response = await ai.models.generateContent({ |
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model: modelName, |
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contents: prompt, |
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config: { |
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systemInstruction: SYSTEM_INSTRUCTION, |
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responseMimeType: "application/json", |
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responseSchema: { |
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type: Type.OBJECT, |
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properties: { |
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isOutOfScope: { type: Type.BOOLEAN, description: "True if the question is not about computer or electronics repair" }, |
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summary: { type: Type.STRING, description: "High-level summary of the diagnostic finding" }, |
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confidence: { type: Type.STRING, enum: ["High", "Medium", "Low"], description: "Diagnostic confidence" }, |
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recommendedCategory: { type: Type.STRING, enum: ["hardware", "software", "cleaning", "upgrades"], description: "Primary repair category" }, |
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probableCauses: { |
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type: Type.ARRAY, |
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items: { |
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type: Type.OBJECT, |
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properties: { |
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cause: { type: Type.STRING }, |
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likelihood: { type: Type.STRING, enum: ["High", "Medium", "Low"] }, |
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explanation: { type: Type.STRING } |
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}, |
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required: ["cause", "likelihood", "explanation"] |
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} |
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}, |
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stepByStepPlan: { |
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type: Type.ARRAY, |
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items: { |
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type: Type.OBJECT, |
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properties: { |
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stepNumber: { type: Type.INTEGER }, |
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title: { type: Type.STRING }, |
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action: { type: Type.STRING }, |
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expectedOutcome: { type: Type.STRING } |
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}, |
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required: ["stepNumber", "title", "action", "expectedOutcome"] |
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} |
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}, |
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toolsAndSoftware: { |
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type: Type.ARRAY, |
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items: { type: Type.STRING }, |
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description: "Diagnostic tools or software like HWiNFO64, MemTest86, DDU, Multimeter, ESD strap" |
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}, |
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safetyWarnings: { |
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type: Type.ARRAY, |
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items: { type: Type.STRING }, |
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description: "Safety guidelines regarding power isolation, battery handling, and ESD" |
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}, |
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preventativeTips: { |
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type: Type.ARRAY, |
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items: { type: Type.STRING } |
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} |
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}, |
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required: [ |
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"summary", |
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"confidence", |
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"recommendedCategory", |
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"probableCauses", |
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"stepByStepPlan", |
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"toolsAndSoftware", |
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"safetyWarnings", |
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"preventativeTips" |
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] |
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} |
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} |
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}); |
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const parsed = JSON.parse(response.text || "{}"); |
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return parsed as DiagnosticResult; |
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}); |
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if (result) { |
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return result; |
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} |
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return generateFallbackDiagnostics(reqData); |
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} |
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function generateFallbackDiagnostics(reqData: DiagnosticsRequest): DiagnosticResult { |
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const sym = (reqData.symptoms || "").toLowerCase(); |
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const err = (reqData.errorCode || "").toLowerCase(); |
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let category: "hardware" | "software" | "cleaning" | "upgrades" = "hardware"; |
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let summary = `Diagnostic assessment for ${reqData.brand || "Device"} ${reqData.model || ""}`; |
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let confidence: "High" | "Medium" | "Low" = "High"; |
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const probableCauses: DiagnosticResult["probableCauses"] = []; |
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const stepByStepPlan: DiagnosticResult["stepByStepPlan"] = []; |
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const toolsAndSoftware: string[] = []; |
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const safetyWarnings: string[] = [ |
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"Always disconnect AC adapter and main battery before touching internal motherboard components.", |
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"Wear an ESD anti-static wrist strap or ground yourself against bare unpainted metal.", |
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"Never compress or puncture swollen lithium-ion battery pouches." |
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]; |
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const preventativeTips: string[] = [ |
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"Keep device firmware/BIOS updated from the official vendor support portal.", |
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"Perform annual dust cleaning and thermal paste refresh to prevent thermal degradation." |
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]; |
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if (sym.includes("blue screen") || sym.includes("bsod") || sym.includes("freeze") || sym.includes("crash") || err.includes("dump")) { |
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category = "software"; |
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summary = "Kernel Stop Code / System Instability detected. Likely caused by conflicting graphics/chipset drivers or RAM memory bit flips."; |
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probableCauses.push( |
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{ cause: "Outdated or Corrupted Graphics/Chipset Drivers", likelihood: "High", explanation: "Conflicting kernel-mode drivers crashing Windows kernel (ntoskrnl.exe)." }, |
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{ cause: "Failing RAM Memory Module", likelihood: "Medium", explanation: "Defective DDR4/DDR5 memory cell failing read/write validation passes." }, |
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{ cause: "System File Corruption (SFC/DISM)", likelihood: "Medium", explanation: "Corrupted system DLLs following incomplete Windows updates." } |
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); |
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stepByStepPlan.push( |
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{ stepNumber: 1, title: "Boot Safe Mode & Run DDU", action: "Boot into Safe Mode, run Display Driver Uninstaller (DDU) to wipe old GPU drivers, then install latest WHQL driver.", expectedOutcome: "Clean driver installation without legacy hooks." }, |
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{ stepNumber: 2, title: "Run DISM & SFC System File Repair", action: "Execute 'DISM /Online /Cleanup-Image /RestoreHealth' followed by 'sfc /scannow' in Administrator Terminal.", expectedOutcome: "System integrity verified and corrupted DLLs replaced." }, |
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{ stepNumber: 3, title: "Execute MemTest86 4-Pass Scan", action: "Create bootable USB with PassMark MemTest86 and test RAM for 4 full passes.", expectedOutcome: "Confirm memory subsystem has zero hardware faults." } |
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); |
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toolsAndSoftware.push("Display Driver Uninstaller (DDU)", "PassMark MemTest86", "WinDbg Preview", "CrystalDiskInfo"); |
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} else if (sym.includes("heat") || sym.includes("fan") || sym.includes("temp") || sym.includes("loud") || sym.includes("throttle")) { |
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category = "cleaning"; |
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summary = "Thermal Throttling & Airflow Restriction detected. CPU/GPU package temperatures exceeding safe operating TJMax thresholds."; |
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probableCauses.push( |
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{ cause: "Dried Thermal Interface Material (TIM)", likelihood: "High", explanation: "Factory silicone paste pumped out or baked, creating micro-voids between die and coldplate." }, |
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{ cause: "Clogged Copper Heatsink Radiator Fins", likelihood: "High", explanation: "Felt-like dust wall trapped between blower fan outlet and copper exhaust fins." }, |
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{ cause: "Bearing Wear on Centrifugal Fan", likelihood: "Medium", explanation: "Imbalanced impeller blades or dry sleeve bearings causing RPM drop." } |
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); |
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stepByStepPlan.push( |
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{ stepNumber: 1, title: "Disassemble Bottom Chassis & Exhaust", action: "Remove bottom cover, disconnect battery, and remove blower fans and heatpipe assembly.", expectedOutcome: "Exhaust radiators and die exposed for inspection." }, |
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{ stepNumber: 2, title: "Clean Fins & Strip Old Paste", action: "Use 99% Isopropyl Alcohol and ESD brush to clear radiator fin walls and remove dried paste from copper coldplates.", expectedOutcome: "Mirror-clean bare silicon die." }, |
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{ stepNumber: 3, title: "Apply Honeywell PTM7950 & Re-torque", action: "Cut and apply 0.25mm PTM7950 phase change pad. Torque heatsink screws diagonally (1→2→3→4) to 0.25 Nm.", expectedOutcome: "Optimal core-to-heatsink heat transfer under sustained load." } |
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); |
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260
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toolsAndSoftware.push("Honeywell PTM7950 / Arctic MX-6", "99% Isopropyl Alcohol", "ESD Bristle Brush", "HWiNFO64"); |
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} else if (sym.includes("power") || sym.includes("dead") || sym.includes("charge") || sym.includes("turn on") || sym.includes("black screen")) { |
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category = "hardware"; |
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summary = "Power Delivery & Initial POST failure. The board is failing to complete the power sequence or standby rail handoff."; |
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probableCauses.push( |
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{ cause: "DC-In Stage or Primary Input MOSFET Short", likelihood: "High", explanation: "High-side DC-in MOSFET (PQ101) shorted to ground, triggering power supply over-current protection." }, |
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{ cause: "Standby 3.3V/5V Regulator Circuit Fault", likelihood: "Medium", explanation: "Buck regulator coil (PL301/PL302) damaged or missing enabling signal from Super I/O EC." }, |
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{ cause: "Stuck Embedded Controller (EC) Register Lock", likelihood: "Medium", explanation: "Transient electrostatic discharge locking the EC power sequencer state machine." } |
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); |
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269
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stepByStepPlan.push( |
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{ stepNumber: 1, title: "15-Second Hard RTC/EC Drain", action: "Disconnect charger and battery. Hold power button firmly for 15 seconds to force residual discharge.", expectedOutcome: "Clear stuck EC register states." }, |
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{ stepNumber: 2, title: "Measure Primary DC Input (+19V/+20V)", action: "Connect power supply with multimeter. Measure voltage on the drain and source of input MOSFETs.", expectedOutcome: "Verify +19V or +20V USB-PD reaches the main power rail." }, |
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{ stepNumber: 3, title: "Check Standby Always-On Coils", action: "Probe coils PL301 (+3.3V_ALW) and PL302 (+5.0V_ALW) with multimeter in DC voltage mode.", expectedOutcome: "Confirm both 3.3V and 5.0V standby rails are stable." } |
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); |
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274
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toolsAndSoftware.push("Digital Multimeter (Fluke/Aneng)", "DC Power Bench Supply", "Torx T5 / Phillips #00 Screwdrivers", "Safety Grounding Strap"); |
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} else { |
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category = "hardware"; |
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summary = `Hardware diagnostic assessment for reported symptom: "${reqData.symptoms}". Follow structured electrical isolation protocol.`; |
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probableCauses.push( |
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{ cause: "Loose Internal Cable or Connector Latch", likelihood: "Medium", explanation: "Vibration or impact dislodging eDP display, battery, or ribbon connector." }, |
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280
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{ cause: "Power Rail Fault or Drained CMOS RTC", likelihood: "Medium", explanation: "RTC clock lockup preventing board POST cycle." }, |
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281
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{ cause: "Component Degradation", likelihood: "Low", explanation: "Capacitor leakage or solder fatigue on mainboard power stages." } |
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); |
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283
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stepByStepPlan.push( |
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{ stepNumber: 1, title: "Hard Power Cycle & CMOS Drain", action: "Disconnect power cord and battery, hold power button for 30 seconds, then reconnect.", expectedOutcome: "Clear transient RTC register locks." }, |
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285
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{ stepNumber: 2, title: "Minimal POST Test", action: "Disconnect non-essential peripherals, Wi-Fi card, and extra storage drives. Test boot with single RAM stick.", expectedOutcome: "Identify if peripheral short is halting POST." }, |
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286
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{ stepNumber: 3, title: "Inspect Connectors Under Light", action: "Check motherboard sockets for bent pins, burn marks, or cracked solder joints.", expectedOutcome: "Confirm physical board integrity." } |
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287
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); |
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288
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toolsAndSoftware.push("Precision Toolkit", "Digital Multimeter", "Anti-Static Mat & Wrist Strap", "Magnification Loupe"); |
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289
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} |
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290
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291
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return { |
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292
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summary, |
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293
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confidence, |
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294
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recommendedCategory: category, |
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295
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probableCauses, |
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296
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stepByStepPlan, |
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297
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toolsAndSoftware, |
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safetyWarnings, |
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preventativeTips, |
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isOutOfScope: false |
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}; |
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302
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} |
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303
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304
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/** |
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305
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* Conversational Technical AI with direct grounding in all 624 guides and 8 manuals |
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306
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*/ |
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307
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export async function runTechnicalAIChat(reqData: TechnicalChatRequest): Promise<TechnicalChatResponse> { |
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308
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const allGuides = await storage.getRepairGuides(); |
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309
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const manuals = TECHNICAL_MANUALS; |
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310
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311
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// Extract latest user message |
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312
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const userMessages = reqData.messages.filter(m => m.role === "user"); |
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313
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const latestUserMsg = userMessages.length > 0 ? userMessages[userMessages.length - 1].content : ""; |
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314
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const queryLower = latestUserMsg.toLowerCase(); |
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315
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316
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// Match relevant guides from the 624 database |
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317
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const matchingGuides = allGuides.filter(g => { |
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318
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const titleMatch = g.title.toLowerCase().includes(queryLower); |
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319
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const descMatch = g.description.toLowerCase().includes(queryLower); |
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320
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const words = queryLower.split(/\s+/).filter(w => w.length > 2); |
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321
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const multiMatch = words.length > 0 && words.some(w => g.title.toLowerCase().includes(w)); |
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322
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return titleMatch || descMatch || multiMatch; |
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323
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}).slice(0, 5); |
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324
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325
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// Match relevant manuals |
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326
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const matchingManuals = manuals.filter(m => { |
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327
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return m.title.toLowerCase().includes(queryLower) || |
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328
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m.summary.toLowerCase().includes(queryLower) || |
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329
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m.keyTopics.some(k => k.toLowerCase().includes(queryLower)) || |
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330
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(reqData.categoryContext && m.category === reqData.categoryContext); |
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331
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}).slice(0, 3); |
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332
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|
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333
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// Voltage rails matching |
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334
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const matchingRails: { rail: string; voltage: string; location: string; description: string }[] = []; |
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335
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manuals.forEach(m => { |
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336
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if (m.voltageRails) { |
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337
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m.voltageRails.forEach(r => { |
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338
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if (queryLower.includes("rail") || queryLower.includes("volt") || queryLower.includes("power") || |
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339
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queryLower.includes("short") || queryLower.includes("multimeter") || queryLower.includes("pl301") || |
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340
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queryLower.includes(r.rail.toLowerCase().replace(/[^a-z0-9]/g, '')) || |
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341
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queryLower.includes("dead") || queryLower.includes("turn on") || queryLower.includes("boot")) { |
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342
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if (!matchingRails.some(mr => mr.rail === r.rail)) { |
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343
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matchingRails.push({ |
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rail: r.rail, |
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345
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voltage: r.voltage, |
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346
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location: r.location, |
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347
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description: r.description |
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348
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}); |
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349
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} |
|
350
|
} |
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351
|
}); |
|
352
|
} |
|
353
|
}); |
|
354
|
|
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355
|
const ai = getGenAI(); |
|
356
|
if (ai) { |
|
357
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// Build grounding knowledge summary |
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358
|
const contextGuides = matchingGuides.map(g => `- [Guide ID: ${g.id}] "${g.title}" (${g.category}, ${g.difficulty}, ${g.estimatedTime}): ${g.description}`).join("\n"); |
|
359
|
const contextManuals = matchingManuals.map(m => `- [Manual ID: ${m.id}] "${m.title}" (${m.code}): ${m.summary}`).join("\n"); |
|
360
|
const contextRails = matchingRails.slice(0, 4).map(r => `- ${r.rail}: ${r.voltage} (${r.location}) - ${r.description}`).join("\n"); |
|
361
|
|
|
362
|
const systemPrompt = `You are JCRGuru's Technical AI, the lead master computer hardware technician, electronics diagnostician, and board-level repair assistant. |
|
363
|
You have direct access to JCRGuru's full database of 624 verified multi-brand repair guides (Apple, Dell, Lenovo, HP, ASUS, Razer, Framework, MSI, Custom PCs) and 8 comprehensive technical manuals. |
|
364
|
|
|
365
|
YOUR CAPABILITIES & PROTOCOLS: |
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366
|
1. Provide precise, actionable technical instructions with exact fastener torque specs (e.g. 0.20 Nm M2.0), screwdriver bit types (Torx T5, Phillips #00), and test procedures. |
|
367
|
2. If the user asks about board-level repair, no-power faults, or charging issues, reference exact voltage rails (e.g. +19V_DCIN, +3.3V_ALW on Coil PL301, +5V_ALW, VCCST, VCORE) and multimeter testing sequences. |
|
368
|
3. If the user has a software/BSOD issue, provide exact commands (DDU in Safe Mode, DISM, SFC, WinDbg minidump triage, MemTest86). |
|
369
|
4. For thermal problems, detail phase-change PTM7950 application and fan fin cleaning. |
|
370
|
5. Provide relevant guide references using markdown bolding or brackets like [Guide: "Device Model: Procedure Name"]. |
|
371
|
6. Keep your tone professional, authoritative, helpful, and concise. |
|
372
|
|
|
373
|
MATCHING KNOWLEDGE BASE FOR THIS QUERY: |
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374
|
Relevant Guides in Database: |
|
375
|
${contextGuides || "Database contains 624 multi-brand hardware guides for Apple, Dell, Lenovo, HP, ASUS, Razer, Framework, and Custom PCs."} |
|
376
|
|
|
377
|
Relevant Technical Manuals: |
|
378
|
${contextManuals || "Technical manuals available: Universal Laptop Teardown, VRM Power Delivery Schematics, BSOD Minidump Manual, UEFI Crisis Flash, Ultrasonic Decontamination, PTM7950 Thermal Standards, NVMe Retrofits, DDR5 Architecture."} |
|
379
|
|
|
380
|
Key Voltage Rails: |
|
381
|
${contextRails || "+19V_DCIN (Input), +3.3V_ALW (EC/Standby), +5.0V_ALW (Peripherals), +VCORE (CPU Core), +1.1V DDR5"} |
|
382
|
`; |
|
383
|
|
|
384
|
const contents = reqData.messages.map(m => ({ |
|
385
|
role: m.role === "assistant" ? "model" : "user", |
|
386
|
parts: [{ text: m.content }] |
|
387
|
})); |
|
388
|
|
|
389
|
const reply = await callGeminiWithFallback(async (modelName) => { |
|
390
|
const response = await ai.models.generateContent({ |
|
391
|
model: modelName, |
|
392
|
contents: contents, |
|
393
|
config: { |
|
394
|
systemInstruction: systemPrompt, |
|
395
|
temperature: 0.3, |
|
396
|
} |
|
397
|
}); |
|
398
|
return response.text; |
|
399
|
}); |
|
400
|
|
|
401
|
if (reply) { |
|
402
|
return { |
|
403
|
message: reply, |
|
404
|
suggestedGuides: matchingGuides.map(g => ({ |
|
405
|
id: g.id, |
|
406
|
title: g.title, |
|
407
|
category: g.category, |
|
408
|
difficulty: g.difficulty, |
|
409
|
estimatedTime: g.estimatedTime, |
|
410
|
})), |
|
411
|
suggestedManuals: matchingManuals.map(m => ({ |
|
412
|
id: m.id, |
|
413
|
title: m.title, |
|
414
|
code: m.code, |
|
415
|
category: m.category |
|
416
|
})), |
|
417
|
voltageRailsMentioned: matchingRails.slice(0, 4), |
|
418
|
quickActions: [ |
|
419
|
"Check +3.3V / +5V Always-On Rails", |
|
420
|
"Open Matching Teardown Guide", |
|
421
|
"Run Minidump / BSOD Triage", |
|
422
|
"View Fastener Torque Table" |
|
423
|
] |
|
424
|
}; |
|
425
|
} |
|
426
|
} |
|
427
|
|
|
428
|
// Deterministic local response based on knowledge base |
|
429
|
return generateDeterministicChatReply(reqData, matchingGuides, matchingManuals, matchingRails); |
|
430
|
} |
|
431
|
|
|
432
|
function generateDeterministicChatReply( |
|
433
|
reqData: TechnicalChatRequest, |
|
434
|
guides: any[], |
|
435
|
manuals: any[], |
|
436
|
rails: any[] |
|
437
|
): TechnicalChatResponse { |
|
438
|
const query = reqData.messages[reqData.messages.length - 1]?.content.toLowerCase() || ""; |
|
439
|
let message = ""; |
|
440
|
|
|
441
|
if (query.includes("power") || query.includes("turn on") || query.includes("dead") || query.includes("rail") || query.includes("charge")) { |
|
442
|
message = `### ⚡ Power Delivery & No-Power Diagnostic Protocol |
|
443
|
|
|
444
|
When troubleshooting a device that will not power on, follow the standard bench sequence: |
|
445
|
|
|
446
|
1. **DC-In & Input Stage Isolation**: |
|
447
|
- Check **+19V_DCIN** or **+20V_USB_PD** after the input MOSFETs. If voltage drops below 19V under load, check for a shorted DC jack or cracked ceramic filter capacitor. |
|
448
|
2. **Always-On Standby Rails**: |
|
449
|
- Verify **+3.3V_ALW** (Coil PL301) and **+5.0V_ALW** (Coil PL302). The Super I/O Embedded Controller (EC) cannot register the power button if +3.3V_ALW is missing. |
|
450
|
3. **Power Button Trigger & RTC Reset**: |
|
451
|
- Check that the power button signal (\`NBSWON#\`) pulls down from 3.3V to 0V when pressed. |
|
452
|
- Perform a 30-second CMOS/RTC hard drain to reset stuck power state machine registers. |
|
453
|
|
|
454
|
I have matched **${guides.length > 0 ? guides.length : "several"} verified guides** and technical schematics from our 624-guide database below:`; |
|
455
|
} else if (query.includes("bsod") || query.includes("blue screen") || query.includes("crash") || query.includes("whea") || query.includes("freeze")) { |
|
456
|
message = `### 🛑 Kernel Crash & BSOD Diagnostic Protocol |
|
457
|
|
|
458
|
For Windows stop codes and system freeze triage: |
|
459
|
|
|
460
|
1. **Clean Driver State**: Boot into Windows Safe Mode and run **Display Driver Uninstaller (DDU)** to remove residual GPU driver hooks, then install clean WHQL drivers. |
|
461
|
2. **System File Integrity**: Open Administrator Terminal and execute: |
|
462
|
\`\`\`bash |
|
463
|
DISM /Online /Cleanup-Image /RestoreHealth |
|
464
|
sfc /scannow |
|
465
|
\`\`\` |
|
466
|
3. **Memory Bus Stress Test**: Launch **PassMark MemTest86** from a bootable USB and complete 4 full passes to rule out defective RAM cells. |
|
467
|
4. **Minidump Stack Analysis**: Open \`C:\\Windows\\Minidump\` using **WinDbg Preview** and run \`!analyze -v\` to isolate the faulting \`.sys\` kernel driver module.`; |
|
468
|
} else if (query.includes("heat") || query.includes("temp") || query.includes("thermal") || query.includes("fan") || query.includes("loud") || query.includes("paste")) { |
|
469
|
message = `### 🔥 Thermal Throttling & Dissipation Protocol |
|
470
|
|
|
471
|
To eliminate thermal throttling and direct-die pump-out: |
|
472
|
|
|
473
|
1. **Phase-Change Interface**: Apply **Honeywell PTM7950 (0.25mm)** phase-change pad on bare CPU/GPU silicon dies. Unlike conventional silicone grease, it will not pump out under thermal expansion cycles. |
|
474
|
2. **Radiator Exhaust Clearance**: Clear the felt dust wall trapped between the blower fan impeller and the copper radiator fins using 99% IPA and an ESD brush. |
|
475
|
3. **Torque Tightening Sequence**: Tighten heatsink retention spring screws in a cross-diagonal sequence (1 → 2 → 3 → 4) to **0.25 – 0.30 Nm** max torque to prevent die cracking.`; |
|
476
|
} else if (query.includes("display") || query.includes("screen") || query.includes("black") || query.includes("edp") || query.includes("backlight")) { |
|
477
|
message = `### 🖥️ Display & Backlight Troubleshooting Protocol |
|
478
|
|
|
479
|
For black screen, no backlight, or flickering display issues: |
|
480
|
|
|
481
|
1. **Flashlight Test**: Shine a bright light at an angle against the LCD screen while powered on. If icons or text are visible, the LCD panel is receiving video data but the **+19V Backlight Rail (VLED)** or backlight fuse (F1) is open. |
|
482
|
2. **eDP Ribbon Connector Inspection**: Disconnect internal battery first. Reseat the 30-pin / 40-pin eDP connector on both motherboard and panel sides. Inspect for pulled pins. |
|
483
|
3. **External Display Verification**: Connect to an external HDMI/DisplayPort monitor to isolate whether the fault is in the internal eDP pipeline or the GPU core.`; |
|
484
|
} else if (query.includes("ram") || query.includes("memory") || query.includes("beep") || query.includes("post")) { |
|
485
|
message = `### 🧠 RAM & Memory Subsystem Validation |
|
486
|
|
|
487
|
For memory post codes, 3-beep codes, or random memory crashes: |
|
488
|
|
|
489
|
1. **Single-DIMM Isolation**: Remove all RAM sticks. Clean the gold edge connectors with 99% Isopropyl Alcohol. Test each stick individually in Slot A. |
|
490
|
2. **SPD / Voltage Verification**: Verify **+1.2V (DDR4)** or **+1.1V (DDR5)** rail across the RAM buck regulator coils. |
|
491
|
3. **4-Pass Stress Testing**: Boot into **MemTest86+** or **Linpack Xtreme** to stress test the memory controller and trace buses for memory bit flips.`; |
|
492
|
} else { |
|
493
|
message = `### 🛠️ Hardware Diagnostic Analysis |
|
494
|
|
|
495
|
I have indexed your query across our **624 multi-brand repair guides** and **8 technical engineering manuals**. |
|
496
|
|
|
497
|
Key technician bench steps: |
|
498
|
1. **Power Isolation**: Disconnect AC charger and internal battery header before touching motherboard components. |
|
499
|
2. **Electrical Measurements**: Probe standby test points (**+19V_DCIN**, **+3.3V_ALW**, **+5.0V_ALW**) to isolate power sequencer states. |
|
500
|
3. **Fastener Torque Standards**: Maintain **0.25–0.30 Nm** on heatsink mounts and **0.18–0.20 Nm** on M.2 SSD screws. |
|
501
|
|
|
502
|
Explore matching repair procedures and manuals directly below:`; |
|
503
|
} |
|
504
|
|
|
505
|
return { |
|
506
|
message, |
|
507
|
suggestedGuides: guides.map(g => ({ |
|
508
|
id: g.id, |
|
509
|
title: g.title, |
|
510
|
category: g.category, |
|
511
|
difficulty: g.difficulty, |
|
512
|
estimatedTime: g.estimatedTime, |
|
513
|
})), |
|
514
|
suggestedManuals: manuals.map(m => ({ |
|
515
|
id: m.id, |
|
516
|
title: m.title, |
|
517
|
code: m.code, |
|
518
|
category: m.category |
|
519
|
})), |
|
520
|
voltageRailsMentioned: rails.slice(0, 4), |
|
521
|
quickActions: [ |
|
522
|
"Check Standby Power Rails", |
|
523
|
"Run Diagnostic Flowchart", |
|
524
|
"Open Software Download Hub", |
|
525
|
"View Torque & Fastener Table" |
|
526
|
] |
|
527
|
}; |
|
528
|
} |