Mac Repair London carries out graphics (GPU) repair on the iMac 27-inch (2012–2020) from our Central London workshop, for home users and businesses.
Graphics on the 27-inch range from NVIDIA GT and GTX chips to AMD Radeon R9 and Radeon Pro. Faults show as lines, artifacts, black screens or crashes. We diagnose whether the GPU, its memory or its power supply is at fault and repair accordingly.
About this model: The 27-inch iMac (A1419 and A2115) includes the Retina 5K models, and the 2020 model is the last Intel iMac. It has a RAM door at the back with four slots, so memory upgrades are easy.
Signs it needs graphics (GPU) repair
- Lines on screen
- Artifacts
- Black screen
- Crashes in games or video
How we do it
On this Mac the graphics hardware sits on a separate card or module, so we test it in isolation, repair or replace it, and clean the cooling path so the new card doesn’t overheat.
Before anything is done, we explain the cost against the value of your machine, and if a repair doesn’t make sense, we’ll still help you get your data off.
At a glance
| Years | 2012–2020 |
|---|---|
| Processor | Intel Core i5/i7/i9 |
| Storage | Standard SATA drive |
| Memory | Socketed, upgradeable |
| Power / charging | Internal mains power supply |
Before you bring it in
Photograph the screen when the fault appears. Stripes, blocks and colour patterns each point to different causes.
Which model do you have?
This page covers the iMac 27-inch & Retina 5K (2012–2020) (iMac13,2 to iMac20,2; A1419, A2115). About This Mac in the Apple menu shows the model and year; the A-number is printed on the underside of the stand. Not sure? Bring it in and we’ll identify it for you.
Price
Non-complex board repairs from £165 + VAT; complex repairs (liquid, lightning or GPU faults) from £285 + VAT. The initial assessment and advice are free, as long as we don't need to open your Mac. If a technician needs to open it and spend time diagnosing the fault, or you need a report for an insurance claim, it is booked in as a diagnostic at £45 + VAT (£54). All prices are subject to inspection, and nothing is done without your approval.
Questions we’re often asked
Can you repair it the same day?
Many repairs are done on the same day when parts are in stock. Board-level work and data recovery usually take a few working days, and we’ll give you a realistic time when we quote.
Is there a warranty?
Yes, our repairs come with a warranty on the work and parts. Ask us for the terms that apply to your repair.
Book a repair
Call us on 020 7394 2528 or email info@mac-repair.london to arrange a time to drop it off.