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820-00239: Not booting up 100% of the time. CPU also warm all the time.

M

macRepairAmb

Member
Have a weird issue with this one. Board came in with issue booting up. It would sometimes boot up to login window, then after a few minutes it starts to have very bad image artifacts. Found light corrosion around UB300. Repaired/replaced corroded caps and resistors around UB300. Pulled a corroded cap on the hall effect sensor (J5260). Some corrosion by UB400. All corrosions have been cleaned off and UB300/UB400 don't seem to have been affected by the corrosion due to what appears to be an insulating material/past covering it's sides/corners.

Still have the same issue where sometimes it would power up all the way to login screen, then after a few minutes image artifacts start to form. But most times it just won't boot, cpu still gets warm. Not sure where to start on this one. Any suggestions?
 
M

macRepairAmb

Member
The artifact doesn?t start showing up for a few minutes, also the liquid spill, or sign of the liquid spill was isolated to UB300 which is on the left end of the board.

but it is possible stuff got to the cpu. That section of the board was very clean with no sign of spill or precious work done.
 
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