820-3332 pulsing rails

[Aivaras]

No liquid damage. Green/orange light. Had short on pp3v42_g3h.

ppbus = 12.57v - stable
g3h = 3.402V -stable
ppvrtc = 3.337v -stable
pp5v_s5 = 5.03v -stable
pp5v_sus = 5.03v
pp3v3_s5 = 3.337v

All other rails when charger connected pulses.

Seems no short to ground.

 

[2informaticos]

CPU coils pulse too?
What about pins 7 & 3 of U7950?

Try to start in SMC bypass mode.