Question PC in restart loop after CPU re-paste ?

May 10, 2021
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Hey guys! I changed paste on my i7 cpu, I didn’t take it out during the process. After I tryed to start PC it keeps restarting after 1-3sec. I read many topics about the same problem and I tested some things like taking out the small battery for 5min then put it back. Then I played with the RAMs. I didn’t touch them during the process, but now my Pc only starts with 2 of them. I tested them all 4 RAM works fine. Only the left 2 slots work however. I have no clue whats going on. Pleas help 🙁
 
You can see on the pic one of the cooler screw stands is missing because when I unscrewed it , it came off.
During paste change, 3 of them did the same. They fell out on the underside of the motherboard.
Could this have damaged the MB or something? Or did I screw it back a bit too hard?