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820-00840 dead

Y

yobad

Member
820-00840 dead
the client said it have liquid damage but i can't see any corrosion
PPBUS_G3H - 13.7V
PPDCIN_G3H - 20.35V
PP5V_S5 - 0V
PP3V3_G3H - 3.426V
PP3V3_S5 - 0V
PP1V8_S3 - 0V
pp3v3_sus - 0.00v
pp3v3_s5 - 0.00v

Buf_smc_reset_l - 3.424v
smc_pm_g2_en - 3.420v

U7890:

1 ssd_pwr_req - 0,33v
2 pmic_en_p3v3s5 - 0,09v
4 pm_en_pvxs5 - 0,00v
6 pp3v3_g3h - 3,42v


PPBUS_PMIC, 13v0
PP3V3_LDO3V, 3.3
PP5V_LDO5V 5v
PMIC_SHUTDOWN_L. 3.3

i already replaced the PMIC
 
2informaticos

2informaticos

Administrator
Staff member
Inspect R7828/29; as per case, only one is used.
Check PPBUS_PMIC and PP3V3_LDO3V.
Also check PP1V25_VREF and PP3V1_RTC.
 
2informaticos

2informaticos

Administrator
Staff member
Did you check for short at PP3V1_RTC?

"R7828/29; ok"
I'm not sure what this means; only one resistor is in place...
 
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