sekidata
Member
This 820-01987 board came with damage to the USB-connector, a shorted audio amplifier, and a liquid damaged backlight FET. After correcting these issues, the board is now stuck at 5V USB-C with PPBUS at 12.3V.
When connected to another Mac, it immediately shows DFU mode and appears to be stuck that way. When I hold PMU_ONOFF_L to ground, DFU mode disappears after a few seconds, then immediately comes back on.
DFU Revive and Restore fail with the error "Unexpected device state 'DFU' expected 'Recovery' (Probably forced into DFU mode externally)".
I tried installing the SOC ROM chip U4770 from another board but the same occurs.
When connected to another Mac, it immediately shows DFU mode and appears to be stuck that way. When I hold PMU_ONOFF_L to ground, DFU mode disappears after a few seconds, then immediately comes back on.
DFU Revive and Restore fail with the error "Unexpected device state 'DFU' expected 'Recovery' (Probably forced into DFU mode externally)".
I tried installing the SOC ROM chip U4770 from another board but the same occurs.
