MacBook A2442 power cycling

[macabook]

Hi, having an issue with A2442 getting 20v around 200mA cycling every 2 or 3 second, same on every usb-c Port. No water damage. PP3V8_AON is 0.100 in diode mode and 100Ohm resistance to ground. When I measure the voltage it 3.8v stable that goes on and off every 2 to 3 second. When I inject voltage it doesn't consume much only 6mA that is not a short.

Compared to similar broad diode mode is 0.330 and resistance in kilo.

I don't know what to do next ?

[mon2]

Test with a known good battery.
Test with a DFU.

https://boards.rossmanngroup.com/thr...0/#post-113047

[macabook]

Thanks mon,
I tried a restore on DFU mode that fails with error 21, the power cycling is no more happening. I tried many times still getting error 21. According logi.wiki it's most probably a NAND issue like the case you shared on Rossmanngroup.

[macabook]

The MacBook finally restored in DFU mode, it was my mistake trying to restore it while on recovery mode (blue MacBook image showing on configuratore 2). I entered DFU with keyboard combinaison and the restore successfully finished on the first attempt.

[mon2]

Excellent.