I have a 820-00923-A board that gets into a S0 state, but no fan spin or image. Since I can't find the correct schematic and brd I'm using the 820-00239 one, seems to work ok with this board.
The board takes about 0.77A and CPU is getting hot, so seems to boot. I'm not getting All_SYS_PWRGD tho.
Some measurements:
PP3V0_G3H = 3V
PPVCC_S0_CPU = 1.098V
PP0V6_S0_DDRVTT = 0.6V
PP1V8_S0 = 1.8V
PP1V2_S0SW = 1.2V
PP1V0_S0SW = 1V
PP5V_S0_T139 = 5.12V
PP5V_S0 = 5.12V
PP3V3_S0 = 3.33V
SMC_PM_G2_EN = 3.4V
PM_PCH_PWROK = 3.31V
PP3V3_PMICLDO = 3.29V
PPBUS_PMIC = 13.03V
CPU_VCCST_PWRGD = 0.999V
S5_PWRGD = 3.25V
SMC_DELAYED_PWRGD 3.4V
Those rails look fine to me, still U7800 it not turning All_SYS_PWRGD on.
No visible liquid damage. I kind of suspect U7800, but the area around that chip looks just fine.
The board takes about 0.77A and CPU is getting hot, so seems to boot. I'm not getting All_SYS_PWRGD tho.
Some measurements:
PP3V0_G3H = 3V
PPVCC_S0_CPU = 1.098V
PP0V6_S0_DDRVTT = 0.6V
PP1V8_S0 = 1.8V
PP1V2_S0SW = 1.2V
PP1V0_S0SW = 1V
PP5V_S0_T139 = 5.12V
PP5V_S0 = 5.12V
PP3V3_S0 = 3.33V
SMC_PM_G2_EN = 3.4V
PM_PCH_PWROK = 3.31V
PP3V3_PMICLDO = 3.29V
PPBUS_PMIC = 13.03V
CPU_VCCST_PWRGD = 0.999V
S5_PWRGD = 3.25V
SMC_DELAYED_PWRGD 3.4V
Those rails look fine to me, still U7800 it not turning All_SYS_PWRGD on.
No visible liquid damage. I kind of suspect U7800, but the area around that chip looks just fine.