820-3330 A1286 Graphic crashes with wired shapes.

[Mac Repairs]

Hi

I have this MacBook board is very clean and no liquid damaged.

Wired graphic crashes.


Can boot to OSX. tried with external monitor same issue with external monitor as well.
Boot with iGPU and no crashing with integrated GPU. works fine.
with above symptoms assuming Gmux is fine Tried to reflow the GPU still same.

Should I replace the GPU?
or do you think it is something else?

Appreciate your advice.

 

[2informaticos]

Try first to resolder U8900 with leaded solder...

 

[Mac Repairs]

Hi thank you for your advice.
Resolder U8900, still same issue. Replace U8900 with known good one , still same issue.

 

[2informaticos]

Then the GPU is the problem...