820-3332 liquid damage

2click

Member
Hi, this board had liquid damage on U5701, after replacing U5701 and components near it, the backlight started to fail fixed that too and left it to try it another day. Now it doesn´t turn on and it is stuck at .29 A

voltages not present:

PP3V3_S0GPU = 0
PPVCORE GPU = 0
PPVCORE S0 CPU = 0
CPUIMVP_PGOOD .064v
CPUIMVP_AXG_PGOOD = 0
PLT_RESET_L = 0
 

2informaticos

Administrator
Staff member
You've said board doesn't turn on; any reason to search for S0 voltages in such case?

Do you get 3V3_S5/SUS?
Did you test the machine disconnecting keyboard flex and battery?
 

2click

Member
I am testing the board out from the case...

pp3v3_s0, pp5v_s0, pp3v3_SUS present, even PM_SLP_S4_L is present, but I can´t get the PM_PCH_SYS_PWROK to be present...
 

2informaticos

Administrator
Staff member
You've said " Now it doesn´t turn on"; seems to turn on, but doesn't boot.

Did you resolder U8900?
ALL_SYS_PWRGD pulses at least?
 
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