820-01598 - No Power - Stuck at 19v .01A

bls951

New member
PPBUS_G3H = 12.23V
PP3v3_G3H = 3.30V
PP1V8_SLPS2R = 1.8V
PP1V8_AWAKE = 1.8V
PP1V1_SLPS2R = 1.1V
PP0V8_SLPS2R = 0.79V
PP3V3_AWAKE = 3.29V
PP1V2_AWAKE = 1.20V
PMU_PVDDMAIN_EN = 0v
P3V3MAIN_PGOOD = 0V
PP3V_G3H_RTC = 3.0V
PCH_RTC_RESET_L = 3.0V
P5VG3S_EN = 0V
PP5V_G3S = 0V
PP2V5_NAND_SSD0 = 0V
PP0V9_SSD0 = 0V
PPVCCQ_ANI_SSD0 = 0V
SSD0_PMIC_VR_P2V5_EN = 0V

The board is very clean. No sign of anything liquid damage. Already replaced the U7800 due to it missing SSD0_PMIC_VR_P2V5_EN but that didn't change anything at all. There is also isn't any shorts on any of the rails that have 0v.

Any help would be appreciated. Thanks
 

bls951

New member
No.
It seems like the boards with 2 nands, one on each side of then board, don’t have u9000 and the boards that have 4 total, 2 on each side, do have u9000. I have multiple boards in which this is the case.
 

bls951

New member
Is it.

In fact, I tried a revive and that fixed the issue. I didn't think that would be the issue since I thought you needed SSD power in order for a revive or restore to work. Good to know for future reference.

Thanks for the help and your time.
 

2informaticos

Administrator
Staff member
Looks like in this case SSD voltages came back after T2 revive.
T2's SMC firmware part is stored on internal ROM.

Thanks for feedback.
 
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