820-01814 - Liquid Damage near GPU VRMs... no video!

down1nit

Member
I figure this is a long shot but how can I diagnose a suspected dead CPU/GPU on this thing?

Damage around QA340 and it's capacitor buddies on pins 18-23. Replaced all. Damage near mux chip and U7370. Replaced both and buddies nearby.

CPU VCC not present, GPUVCC stable around .9V with screen plugged in. Meanwhile the PCH hits about 53 degrees C and stays there. I dont think i can replace the PCH. Are there telltale signals coming from or to the mux or pch that would tell me what stage this thing's stuck in?
 

2informaticos

Administrator
Staff member
U7370 powers VCCSA CPU.
Liquid spill there could already damaged CPU.
Compare resistance to ground on CPU coils with good board.
 
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