820-00165 NO POWER no orange light.

corroded areas u7200,U5000,U7840,Q7130/55 CLEANED. U5000 reballed
PPBUS_G3H was previously shorted. managed to fix this buy replacing Q7310.

now got orange light. no fan spin cannot smc bypass.

PP3V42_G3H_REG=3.4v
PPBUS_G3H=8.56v
SMC_RESET_L=3.3V
PP3V3_S5_REG=3.3V
SMC_PM_G2_EN=3.3V
PPVRTC_G3H=3.3V
PP3V3_SUS 3.3V

PCH RTC signal
RTC_RESET_L 3.3v
PCH_SRTCRST_L 3.3v
PCH_INTRUDER_L 3v
PCH_INTVRMEN 3.1v

trigger SMC_ONOFF_L
pulsing PM_PWRBTN_L from 3.4v to .3v

PM_RSMRST_L is steady high

i didnt get any pulse on:
PM_SLP_S4_L
ALL_SYS_PWRGD
PM_SLP_S3_L
PM_SLP_S0_L
all 0v
 
Last edited:

2informaticos

Administrator
Staff member
"PPBUS_G3H was previously shorted. managed to fix this buy replacing Q7310."
Very likely dead CPU; overvolted through Q7310.
 
Top