820-3437 Dead boiard

[nate8organic]

got in a 820-3437 has liquid damage, no power from charger or battery and no light on charge. getting 2-8v on the c9500 and c9520 2v. found the u7091 seems to be warm around 105 degrees vs 85 around the board.

 

[BCConnection]

If you have no light on charger start with one wire and go from there

 

[dukefawks]

U7091 does not exist. If U7090 gets warm there is probably a short on PP3V42.

 

[nate8organic]

I replaced every part that has pp3v42 going through it except for the big chips. and still nothing on the power adapter or board. im getting 275mv and 52mv on the l7095. also im getting 300+ mv on the f7700 pin 2 and 6.6mv on pin 1 ppbus_g3h. i dont even know at this point

 

[aprendiz]

Maybe I've missed something but 52V where????