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This arrived with a strange no power. Without battery takes 20v and around 150miliamps. On thermal cam U7710 and u8110 were getting warm. Replaced both but no change except they do not get warm now. Also cannot get it into dfu mode The trackpad also clicks in the case but nothing comes on the...

CHGR_ACIN 1.280V

p_in 5.18v SMC_RST* 0.485v SMC_RST_IN 0v VR_AON 2.995v VDDA 4.73v VDDP 4.95V LDO_3P0 2.995V LDO__5P0 4.95V AC_OK, 0V A/BMON 0V/0V

PPBUS_G3H 0.410 3V3_G3H 0.345 L8020 0.401 L7030 0.430 L76700.325 C7043 0V with F7040 removed

diode mode 0.170 instead of 0.420

yes

yes

Arrived with no power. Client claimed liquid damage but no corrosion was found on the board. Discovered Diode mode reading lower then a good board on PPBUS_LIO. When U3100 is replaced, diode mode reading is normal again however once power is applied the same lower reading occurs. Board uses 5v...

There was minor liquid damage but only in C5210 area. Nothing was even shorted or looked damaged except some very minor corrosion on the board itself not touching any components. PPBUS_AON drops to 4V during power cycle of USB input. Goes up to 12.33V when first plugged in, drops to 4V then...

solved after replacing q7800

With or without trackpad flex connected PP3V3_TPAD_CONN is only 1v R5708 is good

This has no trackpad or keyboard. Observed PP3V3_TPAD_CONN is only 1v. Tried different cable and trackpad but no change. What should be checked next?

Tried with lid sensor connected but no change still cannot get into DFU mode

all voltages are good on U8100 and U7700

L8242 diode mode on good board is 0.024 but 0.057 on bad board

They are the same

PP3V3_S2 3.2V PP3V3_AON 3.3V PP5V_AON_P3V8AON 5V PP1V8_AON 1.8V PP1V8_AWAKE 1.8V PP3V8_AON_SPMU_ISNS 3.8V PP1V5_AON_VCORE_SPMU 1.5V PP1V2_AON_SPMU 3.2V P1VP2_AWAKESW_BLC 0V PP0V72_S2_VDDLOW 0.72V Bad U7700 from P1VP2_AWAKESW_BLC 0V????

Which secondary power rails specifically should be checked? I do not know these newer boards as well as the older ones

PPVDD_ECPU_SRAM_AWAKE 0.702V

PPVDD_ECPU_AWAKE is 0.633V Removed L8200 diode mode on U8100 side is 0.525 while other side is 0.25 Is this bad M1?