820-3437-B power off after power on
Hi guys and @refectio
recently i received 820-3437-B board for repair. Previous techniques tell me, that the board was water damaged, so he clean board with isopropyl and ultrasonic cleaner and try fix. After receiving i noticed, there was missed Q7130 and backlight fuse. I solder this fuse and Q7130 from anotner board and put board in to the chassis for test. Macbook power on, but when i want choose boot device Macbook stop working. Does not show any error just only stop working and power off. It is working about 10-20 sec.
Is there any way to find where or what can be wrong?
For which part of the board should I focus on and look for a maybe short circuit?
Thanks guys for your time