iMac 27" black lit screen
Hello,
I have an iMac and it’s driving me mad… It starts up and chimes. The screen is black but lit. I have put a torch right up to the display and can see nothing.
I have took the mac to TFix a UK computer repair center and they have done the following:
Replaced the LCD cable and LCD connections the issue was still present.
We have attempted GPU reball, which has not resolved the issue.
We have purchased and installed new updated GPU chip after installation the original fault was still present.
We have tried to source replacement GPU card however none of our trusted suppliers had any in stock.
I ordered a graphics card before I took it to TFix and it arrived whist it was being repaired.
I put it in and now I have an output on an external monitor and I get the OS-X desktop. I can dim the brightness of the internal display and when I used the volume keys on the keyboard I get sound.
I also bought a new display from ebay but its the same just black and illuminated (however that could be faulty also?).
I can't see how this is a the logic board failure if I can use an external monitor?
Any help would be appreciated thanks
Rick
Is this a good question?
5 Comments
Rick - Can you give us the last three digits of your serial number so we can correctly identify your system. Once we have that we might be able to help.
by Dan
Hello, yes sure it's 5PJ
by Rick C
Rick is this your system? Apple iMac "Core i5" 2.66 27" (Late '09)
by Dan
Yes here is the full spec
Thanks,
Mac 27" Processor: 2.66GHz Core i5 (750)
Model #: A1312
Model Family: iMac Processor: 2.66GHz Core i5 (750) Manufacturer: Intel # of CPUs: 1 Codename: Lynnfield Display:
Size: 27" Finish:
Glossy Resolution: 2560x1440
Memory: 4GB PC3-8500 SODIMM
Max Memory: 16GB #
Graphics: ATI Radeon HD 4850 (512MB)
Base Storage: 1TB 7200RPM SATA 3.5"
Optical Drive: 8x DL Superdrive
Model Number: A1312
Sales Number(s): MB953LL/A
Machine Number(s): iMac10,1 D
Production: Oct 20, 2009 - Jul 27, 2010
Factory: China Production
Year: 2010 Production
Week: 18 (May)
Production Number: 1659
by Rick C
So how was it. Did you fixed? I also have same problem.
by seoungseokkim