820-00239 20v 0A

[Melamanti]

Good evening,

This 820-00239 came ultrasoniced by another shop.
On ampmeter it showed 5v 0a.
Replaced ISL now it opens up the 20v but ppbus_g3h is stuck at 1v.

pp3v3_g3h : 3.41v

no shorts on any line.

Any suggestions?

 

[2informaticos]

Post diode mode to ground at PPBUS_G3H power rail.
Any history about original symptom?

 

[Melamanti]

Sorry for the long delay on replying.
Diode mode to ground on ppbus_g3h is 0.45v.
Original Symptom was liquid dmg.
Nothing much tho.

 

[2informaticos]

Check SMC_RESET_L and BUF_SMC_RESET_L.