820-01041 No Video

[prodigy83]

Okay, sorry about that.
No physical resistors present. I reflowed U7800 and U1200, no change.
I get PP3V3_G3H_T at U8250 but nothing on SENSOR_PWR_EN or PP3V3_G3SSW_SNS.
Replace U8250?

 

[2informaticos]

I still suspect something damaged by corrosion; not easy to find...

 

[prodigy83]

PP1V8_GPU is not present, fried GPU?

 

[2informaticos]

I don't exactly know the place of this voltage in power sequence; may appear later.
Give a try lifting one side the GPU core coils (all).
Not sure for this board, but 01700 stays on and chimes in such case.

 

[prodigy83]

This board never chimed at all. The only thing that comes to mind is the onboard RAM may be the problem area. I have decided to call it quits on this repair but I sincerley really appreciate your ongoing help and support.