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I have a board 820-3437-b that stuck during boot, keyboard lights up but doesn't reach desktop. I lost its original efi bios because the copy I saved is corrupted. I tried different bios for this board but doesn't work.

no power rail missing, usb drive lights up but no chime

pin 5 (SPI_MLB_IO0_MOSI) and 6 (SPI_MLB_CLK) of 6100 are 0V

I received a macbook that has been destroyed under wheel of a car. I tested the motherboard that has not been damaged by the accident with a working macbook and SSD, board booted correctly and showed apple logo but after less then a minute it showed completely black screen, so I forced the...

checked voltage and it's stable 1.8v

r8803 is 10k, while r8802 should be 10k but it's about 9k, already replaced it and still same issue. Tolerance is 5%. could be a u8800 fault? if I heat that area r8802 goes up to 7k

I received from a customer a MacBook 12 820-00045 512gb SSD that doesn't detect SSD, neither in disk utility. I found an other topic here with same issue. The logic board hasn't any liquid damage and any visual defect under microscope, board looks perfect. Is SSD or Controller dead? Has anyone...