Authorised service
Full board replacement
Entire board swapped, data loss on M-series
ZA Support, iMac Logic Board Repair
Component-level repair
We repair only the failed component. Board stays. up-to-3 year warranty.
Common iMac Logic Board Faults
No Power, Dead iMac
Power supply unit (PSU) or power circuit failure on logic board. Common after power surges or load-shedding damage. Fully repairable in most cases.
No Display / Black Screen
Backlight failure, display controller fault, or GPU issue. Fan spins, iMac boots (visible with torch), but screen is completely black.
AMD Radeon GPU Failure (27" Intel)
Screen artifacts, distorted image, or complete display failure under GPU load. Specialist GPU restoration recovers the chip, no board replacement needed.
Liquid Damage
Water, coffee, or cleaning fluid entering through the ventilation slots. Board-level professional clean, corrosion removal, and component replacement.
Thunderbolt / USB-C Failure
No external displays, no peripherals, no charging signal. Thunderbolt controller IC fault, repairable through component replacement.
Fan at Maximum Speed
Persistent max-fan speed caused by a failed ambient temperature sensor, disconnected sensor cable, or SMC fault.
Not Booting, Stuck on Logo
Boot-loop or failure to complete startup. Can indicate storage controller fault, NAND failure, or corrupted SMC, each diagnosable and repairable.
Screen Artifacts / Lines
Horizontal or vertical lines, colour banding, or pixelation. Display interface fault or GPU issue, most cases are repairable without board replacement.
Repair Services
Warranty, Written. No exceptions. No 90-day fine print.
Assessment: from R599, If we cannot repair it, assessment fee of from R599 applies.
Turnaround, Same-day diagnostic. Repairs typically 1–5 business days.
Component-Level Repair, iMac Logic Board ICs
Authorised service replaces the entire logic board. We replace the specific failed IC under microscope. Same result. A fraction of the cost.
| Component | Failure Mode | Symptom | Repair |
|---|---|---|---|
| AMD Radeon GPU (27" Intel) | GPU die solder failure | Artifacts, distorted display, crash on load | GPU restoration |
| CD3217 (USB-C Power IC) | USB-C controller failure | No peripherals, no charging, no display out | IC replacement |
| TPS51980 (PWM Controller) | Power rail dropout | No power, dead on arrival | IC replacement + trace repair |
| LP8550 (LED Backlight Driver) | Backlight driver failure | Black screen, dim display, visible image with torch | Driver IC replacement |
| Thunderbolt Controller | TBT controller IC fault | No Thunderbolt/USB-C output, no dGPU | Controller replacement |
| SMC / Power Management | SMC logic failure | No boot, sensor errors, fan at max | SMC IC replacement |
iMac Models We Repair
All iMac generations from 2015 through M4 (2024).
| Model | Chip | Common Repairs |
|---|---|---|
| iMac 21.5" 2015–2019 (Intel) | Intel Core i5/i7 | Display controller, USB-C, backlight |
| iMac 27" 2015–2020 (Intel) | Intel Core i5/i7/i9 | GPU restoration most common, 27" |
| iMac 24" M1 (2021) | Apple M1 | Power management, USB-C circuits |
| iMac 24" M3 (2023) | Apple M3 | Power ICs, display controller, ports |
| iMac 24" M4 (2024) | Apple M4 | Diagnostic assessment required |
Our iMac Repair Process
Every iMac repair follows the same process. No guesswork. No unnecessary parts. Transparent from start to finish.
Drop-Off or Collection
Bring your iMac to our Hyde Park workshop or arrange collection. We cover Sandton, Rosebank, Randburg, Fourways, and surrounds.
Diagnostic: from R599
Same-day board-level diagnostic. We identify the exact component or circuit at fault, not a guess. You receive a written quote before any work begins.
Component-Level Repair
Under a stereo microscope with temperature-controlled soldering equipment, we replace only the failed IC, not the whole board.
Full Test + Warranty
Post-repair stress test: power cycling, display output, port function, thermal sensors. Up-to-3 year warranty issued on collection.
Why Johannesburg Chooses ZA Support for iMac Repair
Board-Level Repair, Not Replacement
Authorised service replaces the entire logic board. We replace the specific failed IC. Same result, fraction of the cost.
Up-to-3 Year Warranty
We put it in writing. No 90-day fine print like competitors. No exceptions. If the repaired component fails within the warranty period, we fix it at no charge.
Assessment: from R599
If we cannot repair your iMac, assessment fee of from R599 applies, including the diagnostic. No shop in Johannesburg offers this combination with our repair depth.
Apple Silicon Specialists
M1, M3, and M4 iMacs are increasingly common. Our engineers understand the Unified Memory Architecture, we do not guess with Apple Silicon repairs.
4.9★, 120+ Google Reviews
The strongest review authority for Apple repair in Johannesburg. Real clients, real names, real suburbs. Read our reviews on Google Maps.
Hyde Park Workshop
1 Hyde Lane, Second Floor, Office E2004, a premium, secure location. Collection and delivery available across Sandton, Rosebank, Randburg, Fourways, and Midrand.
iMac Repair Reviews, Johannesburg
“My iMac 27" had vertical lines and then went completely black. ZA Support identified AMD GPU failure, reballed it, and it came back perfect. Saved me thousands on a new machine.”
Grant M.
Sandton, Johannesburg
“The iMac just died after a power outage. ZA Support diagnosed a blown power rail on the logic board within the same day. Fixed in two days. warranty is real, they put it in writing.”
Priya N.
Rosebank, Johannesburg
“iMac 24" M1 had no display. I was quoted a high price for a full board replacement elsewhere. ZA Support fixed the display controller IC for a fraction of that. Same day collection.”
Andrew D.
Fourways, Johannesburg
iMac Logic Board Repair, Frequently Asked Questions
iMac Logic Board Fault?
Assessment: from R599. up-to-3 year warranty. Hyde Park, Johannesburg.
Get a second opinion before committing to a board replacement, it costs you nothing.