820-3476 pp5v_s4 0.4v

ajdoc

Member
Liquid damaged board.
85W charger.


PP5V_S5 5V
PP5V_S4 0V, not shorted to ground, diode mode: 0,404
PP3V3_S5 3,3V
PP3V3_S4 0.430V
PP3V3_SUS 3.34V


Got very short voltage spike on PP5V_S4 and PM_SLP_S4_L when charger connected.

Any idea? Thanks
 

2informaticos

Administrator
Staff member
Check for short at C6412/22/32/42.

Any pulse at PM_SLP_S3_L?
If yes, check for pulse at S0 voltages.

Also check ALL_SYS_PWRGD, if pulses at least.
 
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