820-2915 GPU VCORE Problem

[Dozer]

hello,

i have a 2915 with gpu problem. i replacede the gpu, now the picture is ok

and ASD is passing all.

if i start from my ssd in sierra and i start the benchmark software Heaven to test the gpu. i can see it switsching and it is loading and just in the moment it should start the screen goes black.

i replaced already the 3. GPU but nothing is changed.

I measure the PPVCORE_GPU C8942 Pin 1, usually i Have there 1.12.and afte gpu turn on 0.92V
Now I have there 1.22V and after turn on 1.02 V

after the software running "heaven" when the screen turn black I read on C8942 Pin1 0V

I replaced already U8900 and measured all resistors around it . found nothing.

need some help please

 

[2informaticos]

"usually i Have there 1.12.and afte gpu turn on 0.92V
Now I have there 1.22V and after turn on 1.02 V"
In both cases the drop reaction is correct.
You cannot expect to measure the exact value in every board.
Value change depending of board, or multimeter used.
You will also get different value in the same coil, depending which pin you touch; only one has pure DC voltage!
Important is that you detected the correct reaction.
If you really want to take such kind of measurements as refference, be sure to always test in the correct coil point.

"after the software running "heaven" when the screen turn black I read on C8942 Pin1 0V"
So GPU crashes under load.
I think really new chip is no more available. Offer to the client the fixed Intel grapchics, explaining the problem.