MacBook Pro 15 inches A1990 No Backlight repairs

We were measuring 55V at backlight output, which suggests there’s no load , we checked every related section of the board, but couldn’t find a cause , a friend then suggested a DFU restore and that fixed the issue.

[@alfredmarkamposadas5178]

thanks for this vidoes i learned a lot.. i am current fixing a macbook 820-01041.. mosfet is not open no 12v on the output..

[@resetlab7142]

No backlight repairs? What do you have on your diode mode on the backlight output?

[@alfredmarkamposadas5178]

@@resetlab7142 1.1

[@alfredmarkamposadas5178]

@@resetlab7142 i am missing enable signal from my u8400 try another cable and lcd but still same ..