A1707 Rebooting when lid is closed

[andersonamr]

Hi guys, i got this macbook pro A1707 board number 820-00928 which came in for liquid damage, previously worked by another shop.
All around, i made it to work again after several points of damage where reconstructed.

But now, whenever i close the lid/display, it starts to reboot.
It boots, after 2-3 minutes, it reboots and keep on rolling like that until the lid is open, which he works normally.

Area of U4200 was damaged, and worked by the other shop. I did the home work, cleaned the area, u4200 replaced, all bad caps replaced, traces re-made. The area is all good.
But i don't there yet when it comes to read the schematic to identify how this circuits work.

Can you help me out?

 

[andersonamr]

Is there anyway a can deactivate the sleep mode at all? Even when lid is closed?

 

[2informaticos]

J5250/60 are the lid sensor; possibly affected by liquid.
Check R5252/3 and their traces too.

 

[andersonamr]

Both J's are well, measured, tested, both have the same readings.
Both resistors and their traces, are perfect too.
I don't think is about the lid sensors, it's more about what process are done when the sleep mode starts.
It's good to note, it doesn't "reboots" immediately when lid is closed. It takes 1-2 minutes, turns off and starts again by itself.
I'm assuming it has something to do with sleep mode, is there any circuit that takes care of this process?

 

[andersonamr]

Would be a good idea to eliminate sleep mode? Is there any way to do that?

 

[2informaticos]

Test puting machine in suspend from macOS.

 

[andersonamr]

When inducing sleep mode by macos, the behavior is the same.
After 2 minutes in sleep mode, it restarts, but this time when it comes back, prompts to connect wifi and after, it shows the classic Critical Update warning.
Turning it off and starting again, it's all normal.

As i assumed before, it's not related to lid sensors, am i right?
I've seen this critical update failure sometimes in other macs, but hasn't been able to solve this problem once.

Do you have any ideia where we could proceed?

 

[andersonamr]

Alright. Made a really really dumb mistake, accepted the macos update, and now it won't boot, just stuck at the critical update page all over again.

 

[2informaticos]

Possibly corrupted BIOS now.

Does it boot in safe mode?