820-2915 no CPU vcore

roy.ruan

New member
Hi
I having a 820-2915 board, no liquid spilled. all power rails present but the CPU VCORE.

checked on u7400,pin 40,24,15 are all 5v
pin 2 TON=11-12V pin1 EN=3.3V

replaced u7400, but no luck,still the same,any seen this before or any thoughts?

thanks
 

roy.ruan

New member
not much info got from customer, he said it had been like that when his cousin gave it to him. don't see liquid spilled and from the outside case of machine, doesn't look like it had been dropped hard
 

dukefawks

Administrator
Can be absolutely anything. CPU needs to talk to U7400 to enable it. Anything can cause this, knocked off resistor, trace, etc.
 
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