Macbook A1466 820-00165A heavy water damage but working with "flashing" screen

[dbuergi]

Hi all,

i got a A1466 with serious water damage. I was able to clean the whole board and only found a fuse with a coroded trace. Cleaning and resoldering did the job and the macbook started normal but after some time the screen began "flashing" like turning on and off while the Macbook was still running. I checked the board again but was not able to find the problem until now.
Any ideas where to look?

[reformatt]

From experience with liquid damage on Apple boards, you need to examine every passive component with dull grey end caps, as the pad underneath is often corroded (or the connection is bad). Often get boards come back with intermittent issues unless you do that. If the damage is extensive like you say, I write them off as the repair will bounce back to you. I just remove and replace from a donor en masse but I don't waste too much time on them.

First thing for me would be to replace the LCD connector and backlight IC (U7701). The feedback pin is often corroded (pin 5).

[dbuergi]

Thank you for your support. I will have a closer look again at the weekend. I'm only doing this stuff as a hobby and to learn something but the starting position with this board was really bad. All water indicators deep red but since the Macbook is booting i have some hope to find the fault. I also have two donors for parts if needed.
I added some pictures of the first look at the board.