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OK, when battery was connected all came back to normal. Charger charge the battery without any issues and data has been recovered. Dont know why it was stuck at 5V but work now. Thank you so much for help.

Yes, tried with another charger, charger cable, USB C ports and the same behavior (flipped charger cable as well).

C7050 have 0.02V Some of those rails above are not stable and USB C meter switch off and it is in loop every 3 seconds, reach max 0.03A

P_IN 5.15V AUX_DET 1.28V SMC_RST_IN 0V VDDA 5.08V VDDP 5.08V EN_VR1 5.07V SMC_RST* 3.4V AUX_OK 3.4V AMON 0V BMON 0V 3V3_G3H 3.4V

A lot of liquid damage on U3100, U3200, U7100, U7420 Data needed. U3100, U3200 was not looking great. Replaced both but still the same 5v 0.04A from charger. LDOs on all four CD3215 in diode mode and voltage values are correct. PPBUS_G3H 0V and no short. I lifted one side of F7000 and on...

No luck. Wont go to DFU - tried option with PMU_ONOFF_L.

Cant find corrosion on the board. At the begging i noticed there Aplle logo on the screen for 2-3 seconds and it is bootlooping. There was no backlight. When the screen is connected then UP730 was getting hot (there is no short around and I think internal display is faulty thats why UP730 is...

Hmmm Dont know why but have stable PP5V_S4 and L7600 gets hot (85C, 5V and diode mode value correct) Replaced L7600 and is not hot anymore. With battery connected I have 20V 2.85A (board only 20V 1A) so system 'boots'? and battery is charging, fans spins. Caps lock not workig, no chime, CPU...

Yes, battery was charged. It acts strange. I fitted board back to another restore attempt and board boots fine (with data). Disconnected battery and fitted all brackets/screws etc and again have 20V 0A and DFU mode. Next I fitted board to known working chassis with screen, fully charger genuine...

Sorry - I enter wrong board model. Correct board model: 820-00923

Board clean. PPBUS_G3H 13.05V PP3V3_G3H 3.4V PP3V3_S5 and PP5V_S5 voltage pulsing. lifted one side of L7660 and PP5V_S5 is stable (both side of L7660 stable 0V) so fault is on 3V3 rail? Diode mode values: PP3V3_S5 0.350 PP3V3_SUS 0.327 PP3V3_S4 0.326 PP3V3_2V7_NAND_VCC 0.304 PP3V3_S0 0.290...

Board in DFU mode, no corrosion. After unsuccessful restore show error 4014. "4014 - Unexpected reset. Might be caused by T2 RAM error, power rail failure or even a bad battery. History: Client left MacBook for long period of time so battery voltage was too low to be charged. Battery replaced...

Yes, board alone Affect areas: UP800 (removed at the moment because there was short on PP5V_S2_MAIN UD770, C7702, QP700, U5700, UD500, C5150, UR200, R8170, R1983, CE412, UE022

Board with liquid damage. PPBUS_AON = 12.29V PP3V8_AON = 3.78V PP5V_S2 = 0V (pulsing) PP1V8_S2SW = 0V (pulsing) PP1V8_S2 = 0V (pulsing) PP1V2_AWAKE = 0V (pulsing) PP1V2_S2 = 0V (pulsing) PP0V95_S2SW_VDD2L = 0V (pulsing) PP0V855_S2SW_VDDCIO = 0V PPVDD_ECPU_AWAKE = 0V PPVDD_DISP_AWAKESW = 0V...

Quick update. All works fine with new U8100

Cant see any corrosion. PPBUS_AON 12.19V 3V8_AON 3.79V Both CD3217 have correct diode mode values and voltage. Any idea?

Board had small liquid damage on C8101 (PPBUS was shorted, replaced cap and there is no short). U7210/30 are affected by liquid as well. Detected in DFU and restore done without any errors. No chime, no light on caps lock. Board only connected to charger have 20V and 0.08A (CPU get lettile...

Cant find and corrosion on the board. At the start I had 5V from charger. Tried to "revive" in DFU and had error 21. Tried restore and had error 4014. I reflashed SoC ROM and have 20V from charger but still cant restore it. Error 4014. Looks like faulty NAND?

G3S voltage are present in off state when on charger only and when on battery only. I dont have good board around me at the moment. I have similar board which is working fine 820-00923. Is G3S line like S5 or S4 state?

Cant find any corrosion on the board. Tried three batteries and on all of them have the issue. Mac drain battery when in sleep or even turned off. In the evening battery level around 60% and in ther morning battery is 0%. Same issue will three batteries. I removed the board, connected battery...