365-day warranty
Every battery replacement is covered for 365 days — parts and labour. If the new battery fails to perform within that window, we replace it free of charge. ISO 9001:2015 certified service centre.
Read the full warranty policyLast updated June 2026
iMac GPU Failure Repair (Vintage 2011–2014)
Black screen, checkerboard patterns, graphics artifacts or boot-to-grey on a 2011–2014 iMac? That's the well-known AMD GPU failure. We replace the GPU chip directly — not the whole logic board — a repair Apple and most shops won't attempt. 1-year warranty.
- Free FedEx pickup
- Apple-spec parts
- 1-year warranty
- ISO 9001:2015 certified
Or call us directly: 080 4710 3303
How to know it's this
These are the symptoms that point at iMac GPU chip repair. Match them against your iMac, then book a free diagnosis — we confirm the actual fault before quoting.
Checkerboard or pixelated pattern at boot
The classic vintage-iMac GPU signature — the chip's solder joints or die have failed.
Graphics artifacts, lines, or coloured blocks
Distorted graphics in macOS that worsen under load (video, gaming, Maps).
Black screen but the iMac chimes and runs
GPU output has failed while the rest of the board works — a torch on the Apple logo often shows a faint desktop.
Crashes or freezes under graphics load
Intermittent early-stage GPU failure before it goes fully dark.
Why iTweak for iMac
Most repair shops won't touch an iMac. Apple's quote is usually a logic-board swap costing more than the iMac is worth.
iMac is an all-in-one — display, logic board, SSD, RAM, PSU, and chassis are bonded together in a way that intimidates most repair shops. Apple Authorised Service Providers will quote a full logic-board swap for any board-level issue (cost: ₹40,000+). iTweak does component-level work: replace the failed GPU chip (not the whole board), upgrade the SSD without breaking the display bond, replace the fan + thermal paste without damaging the 5K display ribbon. We've been doing iMacs since 2010. 1-year warranty on most repairs.
- Component-level board repair — not assembly swap
- Vintage iMac (2011–2014) GPU failure — our specialism
- 5K / 4.5K display work, bonded panels preserved
- 1-year warranty on most repairs
What iTweak fits — across every iMac repair
iMac repair is the clearest example of where independent specialists beat AASPs on price and engineering. The AASP quotes a "logic-board replacement" because Apple's parts catalogue lists the whole board; we do the actual repair.
Recommended
What iTweak fits
Component-level repair, original chassis preserved
- Scope of board repair
- Component-level — failed chip or capacitor only
- Display bond
- Preserved — we don't break the 5K panel adhesive
- SSD upgrade path
- Yes — Fusion-drive split, NVMe upgrade where supported
- Vintage GPU re-flow / replace
- Yes — 2011–2014 iMac specialism
- Diagnostic
- Free if you proceed with the repair
- Warranty
- 1 year, parts + labour
Available at every iTweak storefront
We don’t fit
What Apple Authorised Service Providers do
Full logic-board swap, expensive but correct
- Scope of board repair
- Whole logic board replaced
- Display bond
- Often broken during repair
- SSD upgrade path
- Not offered (factory build only)
- Vintage GPU re-flow / replace
- Vintage out of support
- Diagnostic
- Usually a paid service
- Warranty
- 90 days Apple service warranty
How an iMac repair works at iTweak
iMac repairs are bench-only — they need proper display-separation tooling and ESD-protected work. Free FedEx pickup pan-India in iMac-grade packaging, or walk into our Marathahalli centre.
1Tell us the issue
Book online or call. Describe what's wrong (no display / GPU artifacts / SSD swap / slow / fan loud). Tell us the model — About This Mac → System Report → Model Identifier confirms it (e.g., 'iMac17,1').
2Free FedEx pickup or walk-in
Free insured pickup pan-India in iMac-grade packaging (custom-fit foam, ~30kg shipping weight). Or walk into Marathahalli (Bangalore). Typical round-trip: 6–8 working days from anywhere in India (iMacs are slower than smaller devices to ship).
3Diagnose and quote
Apple Diagnostics + bench-level testing (multimeter, microscope, thermal scan). We confirm the actual fault — GPU vs board vs SSD vs PSU — before quoting. Written quote, itemised, approve or decline.
4Component-level repair
Display panel safely separated using suction + heated mat (no heat gun). Component-level board work — chip replacement, capacitor reflow, BGA rework where needed. SSD swap where requested. Reassembled with Apple-spec adhesive.
5Test, calibrate, return
Apple Diagnostics post-repair, thermal calibration, display calibration. 1-year warranty paperwork. Return courier or walk-out.
If it’s not the battery, you don’t pay for the swap
Our 80-point Phonecheck diagnostic runs before any disassembly. If the issue turns out to be elsewhere — charging IC, board fault, software — we tell you, refund the booking, and quote the actual fix. No upsells.
- Pre-repair diagnostic on every booking
- Written quote before any work begins
- 100% refund if mis-diagnosed
- No part used without your sign-off
What our customers say
4.2 · 704+ Google reviews 4.2 · Justdial
“The technician arrived punctually at my residence, thoroughly explained the issue, and completed the iPhone 13 battery replacement in about 30 minutes. Seamless and professional.”
Sriram SrinivasaniPhone 13 · Battery · Bangalore“These guys worked like magic. Apple said the only fix for my cracked iPad screen was to replace the entire unit — which I refused to believe. iTweak proved them wrong.”
Niranjan SridhariPad · Screen · Bangalore“Booked a home appointment, the technician came on time and replaced the screen within 30 minutes — working great, no issues. Would recommend to anyone who wants to save money.”
Mukul KumarDoorstep · Screen · Bangalore“Got my Apple Watch battery replaced through iTweak in Bangalore — the entire experience was truly seamless and professional.”
Harshan KumarApple Watch · Battery · Bangalore“Quick same-day screen replacement for my iPhone 17 Pro Max. Highly recommend.”
Adithya SarmaiPhone 17 Pro Max · Screen · Bangalore“Best place for iPhone repair — genuine parts at an affordable price. They replaced the back panel of my iPhone 15 and I had it back within 4 hours.”
Rakesh PateliPhone 15 · Back glass · Bangalore
Find us
Walk in or book doorstep service at our Bangalore workshop. Free pickup & drop-off across Mumbai, Chennai and anywhere else in India.
Marathahalli, Bangalore
35 Varthur Main Road, Marathahalli, Bangalore 560037
- 9am – 8pm (Wed to 5pm, Sun 10am – 7pm)
- 080 4710 3303
- Doorstep
- Pickup
- Walk-in
Mumbai
Free pickup & drop-off across the city — no doorstep visit needed.
- 9am – 8pm (Wed to 5pm, Sun 10am – 7pm)
- 080 4710 3303
- Pickup
Chennai
Free pickup & drop-off across the city — no doorstep visit needed.
- 9am – 8pm (Wed to 5pm, Sun 10am – 7pm)
- 080 4710 3303
- Pickup
FAQ
Process, warranty, data, models — the imac gpu failure repair (vintage 2011–2014) questions our iMac techs hear.
Yes — it's a specialism. Those AMD GPUs are prone to chip failure (black screen, checkerboard, artifacts). We replace the failed GPU chip directly and keep the rest of the iMac intact, where Apple deems it 'vintage' and most shops won't try.
We fit a sound replacement GPU and reflow with proper profiles, then carry a 1-year warranty — if the chip fails again within 12 months, it's a free replacement.
Often yes — a GPU chip repair is a fraction of a new iMac, and these machines are still capable for everyday use. We'll give you an honest view for your specific model before any work.
Free insured pickup pan-India · 9am – 8pm (Wed to 5pm, Sun 10am – 7pm)