ALB-Repairs
Member
Hi
I have an 820-2915 that came in with no power. It had no signs of liquid damage, however 2 of the three GPU rails where dead short to ground. It had signs of an apple refurb previously.
i fitted a new GPU, shorts gone, however it very rarely produces an image at all. The fan spins up twice like other 2915's that recognise a gpu.
The confusing part starts here-
Regardless of weather there is an image it boots fully and gives a keyboard backlight. When i have had it displaying, it would boot white and then loose display, but rather than restarting it would continue to boot and remain on with a keyboard backlight, neither internal or external display works.
Ive reflown the VRAM, the GMUX, checked for missing components around the GPU and Vram, checked the power rails.ect.
I even pulled the replacement GPU off and checked the solder joints/site and couldn't see any issues. Im assuming this board has bitten the dust, but due to the obscure nature of this one i thought id ask.
Maybe it was something to do with the initial GPU being shorted? Id love to say i messed this GPU up, but ive done plenty of 2915's before and never really seen the strange mixture of faults this machine is presenting.
I have an 820-2915 that came in with no power. It had no signs of liquid damage, however 2 of the three GPU rails where dead short to ground. It had signs of an apple refurb previously.
i fitted a new GPU, shorts gone, however it very rarely produces an image at all. The fan spins up twice like other 2915's that recognise a gpu.
The confusing part starts here-
Regardless of weather there is an image it boots fully and gives a keyboard backlight. When i have had it displaying, it would boot white and then loose display, but rather than restarting it would continue to boot and remain on with a keyboard backlight, neither internal or external display works.
Ive reflown the VRAM, the GMUX, checked for missing components around the GPU and Vram, checked the power rails.ect.
I even pulled the replacement GPU off and checked the solder joints/site and couldn't see any issues. Im assuming this board has bitten the dust, but due to the obscure nature of this one i thought id ask.
Maybe it was something to do with the initial GPU being shorted? Id love to say i messed this GPU up, but ive done plenty of 2915's before and never really seen the strange mixture of faults this machine is presenting.