820-3476-A Only safe boot works

macfix

Member
Hello

I m working on 820-3476-a few months ago liquid damaged and cleaned by another service. Board worked 1 week only then stopped .

Machine working only safe mode (when you press shift key machine booting) other way when you see desktop or login screen freeze computer.

Tested known good , OS with external and internal disks , keyboard,trackpad, battery.

I can install OS without problem but when start to login screen freeze again..

When checked board saw bios touched some one so tried 3 different bios with my older used file (also clean me bios )

ASD starting freeze restart computer:(

Any idea about this situation ...
 

dukefawks

Administrator
Safe mode working would suggest it is a device driver hanging the system. Remove everything not needed for booting and try booting the bare board. Check corrosion around CPU Vcore supply and SMC.
 
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