At Xigox, we provide expert Laptop Repair services in Mumbai with over 20 years of industry experience. Our certified technicians specialize in diagnosing and resolving all types of issues quickly and efficiently.
We understand how frustrating technical problems can be. That's why we offer same-day service with genuine parts and comprehensive 6-month warranty. Our Mumbai-based service center is equipped with state-of-the-art tools to handle any repair or maintenance requirement.
Call or WhatsApp us at 7499761196 to describe your issue
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Expert repair using genuine parts and proper tools
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We provide Laptop Repair services throughout Mumbai and surrounding areas including all major localities. Our service coverage extends across Mumbai, Navi Mumbai, and Thane regions.
Our Laptop Repair specialists in Mumbai are ready to help
Available 7 Days a Week | Same-Day Service
With over 20 years of excellence in Laptop Repair, we've built our reputation on quality work, transparent pricing, and outstanding customer service. Every device we service is treated with the same care and attention as if it were our own.
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Advanced laptop BIOS recovery & chip programming in Virar West & Virar East. BIOS corrupted, boot loop, blank screen after BIOS update, BIOS password locked, boot device not found? BIOS chip programming, UEFI recovery, CMOS reset. All brands - HP, Dell, Lenovo, Acer, Asus!
*Advanced technical repair
Laptop restarts repeatedly. Can't enter BIOS or Windows. Corrupted BIOS firmware or CMOS battery dead.
Updated BIOS, now blank screen/won't boot. Power interruption during update corrupted BIOS chip.
Forgot BIOS supervisor password. Can't access BIOS settings or boot laptop. Needs password reset/removal.
"No bootable device" error. BIOS not detecting hard drive/SSD. Boot order corrupted or SATA controller disabled.
Power on, fans spin, no display, no beep, no BIOS screen (POST). Completely dead BIOS chip.
"CMOS checksum bad" on startup. Date/time resets. CMOS battery dead (₹200-₹500 fix!) or BIOS corrupted.
Advanced BIOS repair, chip programming, password removal. FREE diagnosis in Virar!
Understanding BIOS/UEFI: What is BIOS: Basic Input/Output System - firmware that runs BEFORE Windows loads. Stored on BIOS chip (8-pin or 16-pin IC on motherboard). Functions: 1) POST (Power-On Self Test) - checks RAM, CPU, GPU, HDD, 2) Initializes hardware (keyboard, display, USB, SATA), 3) Loads bootloader (Windows Boot Manager, GRUB), 4) Provides BIOS Setup utility (F2/Del - change settings). UEFI (modern BIOS): Unified Extensible Firmware Interface - replacement for legacy BIOS (laptops 2012+). Features: Graphical interface (mouse support!), Secure Boot (prevents malware), Fast Boot (skips POST checks), Support for GPT disks (>2TB), Network boot (PXE). BIOS chip: Usually Winbond 25Q series (25Q64, 25Q128) or Macronix MX25L. Size: 8MB-16MB (tiny!). Located near battery or RAM slots on motherboard. Why fails: Power interruption during BIOS update (corrupts firmware), Electrical surge/static (fries chip), Manufacturing defect (cheap chips), Age (20+ years - chip degradation).
Failed BIOS Update - #1 Issue: Updating BIOS is RISKY! When update goes wrong: Battery dies mid-update, Power outage, Windows crashes during update, Wrong BIOS file downloaded (for different laptop model!), USB drive disconnected during update. Result: Half-written BIOS = corrupted firmware = laptop DEAD (won't power on or black screen). Recovery methods: 1) Crisis Recovery (HP, Lenovo, Asus): Special recovery mode built into BIOS chip. Process: Download correct BIOS file → rename to specific name (HPBIOSUPDATE.bin, BIOS.CAP, etc.) → copy to USB root → laptop off → hold Fn+B or Fn+Esc or Windows+B → plug AC power → release keys → laptop auto-reads USB + reflashes BIOS. Takes 5-10 minutes (fan spins, LED blinks). Success rate: 60% (if BIOS chip partially alive). Cost: ₹2,000-₹3,000 (we do this service, provide correct BIOS file). 2) SPI Programmer (CH341A): Hardware programmer device. Remove BIOS chip from motherboard (8 pins, desoldering required), Insert chip into programmer socket (IC clip for non-removal programming), Connect programmer to laptop/desktop via USB, Use software (AsProgrammer, NeoProgrammer) to write fresh BIOS firmware, Resolder chip to motherboard (or use IC clip). Success rate: 90% (unless chip physically dead). Cost: ₹3,000-₹8,000 (labor-intensive, 3-5 hours, requires micro-soldering skill). Our equipment: We have CH341A + IC clip + hot air station in Virar workshop. Can recover most "dead" BIOS chips!
BIOS Password Removal: 2 password types - different removal methods! Type 1 - User/Power-On Password: Appears at boot (before Windows). Blocks laptop startup. Removal: a) CMOS reset (remove battery 10 min) - works 50% on old laptops (₹500), b) Backdoor passwords (manufacturer codes) - works 20% (Google "laptop model backdoor password"), c) EEPROM erase - works 90% (₹1,500-₹3,000). Type 2 - Supervisor/Admin Password: Locks BIOS settings access. Can boot to Windows but can't change BIOS. Removal: CMOS reset doesn't work (password stored in EEPROM chip, not CMOS RAM). Only solution: EEPROM chip programming. EEPROM password removal process: Disassemble laptop → locate EEPROM chip (24C02, 24C04, 24C08 - small 8-pin chip near BIOS), Desolder chip from motherboard (hot air station 300°C), Insert into programmer (TL866 or CH341A), Read chip content (dump to file), Analyze dump → identify password bytes (usually at specific offset), Erase password section (set to 0xFF), Write modified dump back to chip, Resolder chip to motherboard, Test (BIOS should be unlocked!). Takes 3-4 hours, delicate work (EEPROM tiny!). Cost: ₹1,500-₹3,000. Corporate laptops: Many companies set supervisor password (prevent employees tampering). If company laptop: Need authorization letter or ownership proof (we won't bypass corporate security without permission - legal issue!).
CMOS Battery Replacement: Easiest BIOS fix! Symptoms of dead CMOS battery: "CMOS checksum error" / "CMOS battery low" every boot, Date/time resets to default (2001, 2010), BIOS settings don't save (boot order resets), Have to press F1/F2 to continue boot. What is CMOS battery: CR2032 coin cell (3V lithium, 20mm diameter). Powers CMOS RAM chip (stores BIOS settings when laptop off). Lifespan: 3-5 years (some last 10 years, depends on usage). Replacement process: Disassemble laptop (remove bottom panel, keyboard, sometimes palm rest), Locate CMOS battery (silver coin on motherboard - near RAM slots usually), Two holder types: a) Socket holder (battery clips in - easy to remove ₹200-₹300 labor), b) Soldered holder with cable (need desoldering - ₹400-₹500 labor), Remove old battery → insert new CR2032 (₹50-₹100 from electronics shop), Reassemble → power on → enter BIOS (F2/F10), Set date/time → save BIOS settings → exit. Test: Shut down → remove AC+battery → wait 5 min → power on. If date/time retained = SUCCESS! Total cost: ₹200-₹500 (battery ₹50, labor ₹150-₹400). Takes 30 min to 1 hour (depends on disassembly complexity). Soldered battery: Some laptops (HP EliteBook, ThinkPad X1) have CMOS battery soldered directly to motherboard (no holder). Replacement requires: Desoldering old battery (spot welding or solder tabs), Soldering new battery with tabs, Adding holder (for future replacement). Cost: ₹800-₹1,500 (advanced work).
BIOS Chip Programming Equipment: Professional gear needed! 1) CH341A USB Programmer: Cost ₹500-₹1,000. Reads/writes BIOS chips (SPI flash). Software: AsProgrammer, NeoProgrammer, FlashROM. Supports: Winbond 25Q, Macronix MX25L, SST, AMIC, etc. 2) IC Clip (SOIC-8): Cost ₹300-₹500. Clips onto BIOS chip without desoldering (in-circuit programming). Advantage: Faster, no soldering risk. Disadvantage: Doesn't always work (motherboard power interference). 3) Hot Air Station: Cost ₹5,000-₹15,000. For desoldering chips (300-350°C hot air). Brands: Quick, Yihua, Ersa. 4) Soldering Iron: Cost ₹500-₹5,000. For resoldering chips (fine tip, temperature controlled 300-350°C). 5) BIOS Firmware Files: Downloaded from manufacturer website (HP, Dell, Lenovo support) or BIOS repository websites (badcaps.net, biosfiles.com). Our workshop: We have all equipment in Virar! CH341A programmer, IC clips (SOIC-8, SOIC-16), hot air rework station (Quick 861DW), Hakko soldering iron, BIOS file library for popular HP/Dell/Lenovo models. Can recover 90% of BIOS failures!
Brand-Specific BIOS Issues: HP Pavilion/Envy: BIOS update via HP Support Assistant sometimes fails (bad file download). Recovery: Fn+Esc crisis mode + USB (₹2,000-₹3,000). BIOS chip: Winbond 25Q128 (16MB). Dell Inspiron/XPS: Secure Boot issues common (blocks Linux, old Windows). Disable Secure Boot: BIOS → Secure Boot → Disabled. BIOS password: EEPROM 24C02 chip (near CMOS battery). ₹1,500-₹3,000 removal. Lenovo IdeaPad/ThinkPad: Novo button (side button) for BIOS/recovery access (useful if BIOS menu not accessible via F2). BIOS password: Stored in security chip (embedded). Removal difficult - contact Lenovo service (or EEPROM programming ₹2,000-₹3,000). Acer Aspire: BIOS often locked (hidden advanced settings). Unlock: Ctrl+S or Ctrl+F1 in BIOS (reveals advanced tab). BIOS update: Via Windows (InsydeFlash). Asus VivoBook/ROG: EZ Flash utility in BIOS (F7 key). Can reflash BIOS from USB without Windows. Crisis recovery: Ctrl+Home during boot.
POST (Power-On Self Test) Beep Codes: Laptop beeps at startup - BIOS talking! Understanding beeps: BIOS runs diagnostics (POST) → if error detected → beeps code → tells you what's wrong! Common beep codes: 1 beep = POST passed (normal - everything OK), 2 beeps = POST error (check screen for error message), 3 beeps = RAM error (reseat RAM or RAM dead), 4 beeps = Timer failure (motherboard issue), 5 beeps = CPU error (CPU or motherboard dead), Continuous beeping = Power supply or RAM issue, No beep + no display = Dead BIOS or motherboard. Brand-specific: HP: 3 long beeps + 2 short = RAM error, Dell: 7 beeps = CPU error, Lenovo: Varies (check Lenovo support beep decoder). If no beep at all: BIOS not running POST (BIOS chip dead or motherboard CPU/chipset dead). Diagnosis: If fans spin but no beep/display = likely BIOS chip (₹3,000-₹8,000 chip programming). If nothing happens = motherboard power issue (₹5,000-₹15,000).
Secure Boot & Boot Mode Issues: Windows 11/10 prefers UEFI + Secure Boot enabled. Secure Boot: Security feature (prevents unsigned bootloaders - blocks malware). Blocks: Linux (Ubuntu, Fedora - unless signed), Old Windows (7, XP), Unsigned drivers. If installing Linux or dual-boot: Disable Secure Boot! BIOS → Security → Secure Boot → Disabled. Boot Mode (UEFI vs Legacy): UEFI (modern, fast, GPT disks), Legacy/CSM (old, slow, MBR disks). Common problem: Windows installed in UEFI mode but BIOS set to Legacy (or vice versa) = "No boot device" error! Fix: Match BIOS boot mode to Windows mode. Check: Open laptop → if Disk Management shows "GPT" = Windows is UEFI (set BIOS to UEFI). If "MBR" = Windows is Legacy (set BIOS to Legacy/CSM). Converting: MBR → GPT without data loss: Use MBR2GPT.exe (Windows tool). Then enable UEFI mode.
Prevention Tips: Avoid BIOS issues! 1) Don't update BIOS unless necessary: "If it ain't broke, don't fix it!" Update only if: Manufacturer recommends (security patch), New CPU support needed, Boot issues that BIOS update claims to fix. Never update just because "new version available"! 2) If updating BIOS: Full battery charge (80%+) + AC connected (mandatory!), Close all programs (including antivirus), Don't touch laptop during update (10-15 min - be patient!), Don't force shut down if appears frozen (give it 30 min). 3) CMOS battery: If laptop 4-5 years old + CMOS errors appearing → replace battery preemptively (₹200 now vs ₹2,000 BIOS issues later). 4) Power protection: Use surge protector (₹500-₹1,500) - prevents electrical surge damage to BIOS chip. 5) Regular servicing: Dust + heat = electronics failure. Annual laptop cleaning (₹800-₹1,200) prevents overheating damage to BIOS chip.
When BIOS Repair Not Possible: Some cases are beyond BIOS! 1) Motherboard chipset dead: BIOS chip OK but CPU/chipset not responding. Symptoms: Fans spin, no beep, no display, no LED activity. Cost to repair: ₹8,000-₹25,000 (motherboard replacement - often not worth it). Consider: Buy used laptop same model (₹10,000-₹20,000) → swap your HDD/RAM to it. 2) Multiple failed programming attempts: If we tried chip programming 3 times + still doesn't work = chip physically dead (burnt). Solution: Buy replacement BIOS chip online (₹500-₹1,500) + program it + resolder (₹2,000-₹3,000 labor). 3) Corporate BIOS lock: Enterprise laptops (HP EliteBook, Dell Latitude, ThinkPad) have enhanced security (TPM, Computrace). BIOS password removal may trigger: TPM clear (BitLocker recovery needed), Computrace activation (laptop reports stolen!), Firmware lock. If corporate laptop: Better to contact IT department or original company.
Service Coverage: Virar West (Sheetal Nagar, Doghar Pada, Datt Mandir Road, Agashi Road), Virar East (Railway Station, Global City), Nalasopara, Vasai Road. Free pickup/delivery! BIOS diagnosis FREE - we'll identify if CMOS reset (₹500), password removal (₹1,500-₹3,000), or chip programming (₹3,000-₹8,000) needed. Advanced repair - 1 day to 2 days turnaround!
Contact us today at +91 7499761196 or WhatsApp. BIOS corrupted? Boot loop? Password locked? Free diagnosis in Virar. Advanced BIOS recovery specialists!
FREE Diagnosis • CMOS Reset ₹500 • Password Remove ₹1,500 • Chip Programming ₹3,000-₹8,000
Available in all major areas