A1286 820-2850 black screen after 20 minutes roughly,CAP had been changed.

[roy.ruan]

having this 820-2850 board., it would turn off the video to black screen after around 20 minutes usage.
thought may have something to do with C9560, changed it ,(did this repair many times already for this model,so nothing wrong with the replacement)
but problem is still there . any one came across this ??

thank you

 

[dukefawks]

Probably a real dead GPU in this case.

 

[roy.ruan]

big chance on the GPU right? since I fixed problem with the MUX and VRAM also on this model.seems like everything is possible lol.
just want to get a hint before I replace all of them lol..
thanks Duke,i will just go ahead and replace the GPU then