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820-2915 shows apple logo and progress bar but then white screen

Jay

Jay

Member
When I boot with ALT I see the boot picker, I can select other external drives but when it gets to a point something should show on the screen, all I get is white. In the case of ASD which has a blue background, all I get is blue. Don't want to start blaming the GPU right away but in this case I also have no idea where I should begin to look.

Before the white or blue screen there is no weird pixelation or any indication the GPU is having an issue. Visual inspection showed a perfect board. On a bare system same issue.
 
TCRScircuit

TCRScircuit

Super Moderator
Staff member
Try 165 C for 2 min 30 sec FOR A DIAG METHOD ONLY!!! This is not a solution. 165 is cool enough that it will not harm the chip if in fact the issue is something else but I will bet money it's the gpu
 
Jay

Jay

Member
Yup, heated the GPU and issue was "resolved". What are the chances of finding a good GPU for this model 6-7 years later, worth having it repaired? (I don't have the equipment needed to replace such large components).
 
D

dukefawks

Administrator
If you are in the EU I can help you, send DM. If you're not then dump it on Ebay, lots of idiots paying good money even for dead ones.
 
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