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Clean board, makes it to 20V but not 5 seconds later goes back to 5V then repeats. Checked for shorts everywhere and found nothing, checked with thermal camera but there is nothing obvius. PPBUS makes it to 12.2V then drops.

Tried new U7000 and U7800 and same result, thanks for your time and help

Im about to return this to the customer, any other tips I should try, this seems really weird to me, the battery is not the problem.

Yes percentage drops normal. Charger alone no battery connected 12.3V All 4 ports make it to 20V with no restarts

Thanks, I tried another original battery from another case and same thing.

Just did, but same thing, Mac runs off from battery if there is charge, I do get percentage at the top right inside OS charger is detected and shows the sign of charging but it saids Mac is not charging even after a while.

Still the same

No battery, just power supply: Diode 470 both Voltage mostly 2.6V then changes back to 1.8V and repeats both of them With battery voltage is about the same behavior.

Should I kiss this one adios?

C7020 ohm AB 150k or end to end 4ohms C7023 ohm AB 60k or end to end 4ohms A/BMON 0V with battery connected, with and without charger A/BMON 0V without battery connected, with charger connected

Ok after checking some more I found PP1V2_S3 to be low in diode read 0.050 vs 0.225 when I inject 1.2V on that line the RAM chips are the only ones getting some temperature.

Yes, tried 2 different batteries and 2 different screws, both tight and after connecting battery, flex and charger board boots, no charger I get around 11V on main so the battery is for sure well connected. Also replaced U7000 but same result.

Restored T2 no data and installed clean OS, same problem still.

SSD rails all get 0V

Tried but no luck, I even tried my force DFU method on a different board and that other board did enter DFU, but not this one. Here is my method just in case: Short the Force DFU test point (PMU_FORCE_DFU) to any 1.8V line Connect restore cable to the correct port for T2 restore Connect to...

Board had issues with U2890 and UB090 and was stuck in 20V, fixed that and now I get to 20V but no power and no detection in DFU. SSD power is missing. PMU seems to be working fine. SLPS2R and Awake signals ok but PP1V2_AWAKE_SOC_PLLSOC_F is 0.7V not sure on that one, diode read OK.

Clean board, battery is recognized in OS, stays at 1% and OS said battery is not charging, runs from battery only. Tried different known good battery and flex and same thing. Tried different charger same thing. SYS_DETECT_L 0V SYS_DETECT 3.3V Diode readings on J6951 are fine. Board alone...

No shutdown on its own. Right now the problem happens very randomly maybe 2-3 times per day if you shutdown and turn the mac back on several times per day.

Clean board already restored T2 and reinstalled OS. The problem happens a few times per day, when the Mac is shutdown and powered back on the panic appears showing GPU panic Failed Power Play Resume as part of the string, other than this the Mac works fine per our testing.

Any additional pointers will be greatly appreciated.