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50v on a working board.

Yes it’s an original cable. I have a complete working a1990 that I took the cable from and installed the logic board into the housing. I’m also able to verify the lcd cable and lcd for the board I’m having issues with works with a known good logic board.

I have an 820-01814 with no backlight. The board is very clean and has no sign of liquid or anything else that is obvious. There is 55v on PPVOUT_S0_LCDBKLT - I understand that means it's not detecting a load/LED strings from the LCD. I have changed the LCD cable with a known LCD cable, a...

Thanks for the reply. The issue was a trace between Pin 8 of U5850 and Pin 6 of U5820. Ran a wire and it works great now. Thanks for your help.

Hello, The board originally came in for no power. It had a short in the PCB on PPBUS_G3h near J6430 caused by liquid damage. That was cleaned and the short in the PCB was cleared, now the Macbook turns on and boots but the fans run at full speed and runs slow. I ran HWmonitor and the only thing...