Hi everyone! I have a problem with my PC’s RAM. Last week I cleaned my PC and also changed the thermal paste of my liquid cooler. To do this I removed all 4 RAMs from the slots. I reassembled everything exactly as it was before, but now when I turn on the PC, if I insert all 4 RAMs a yellow light turns on on the motherboard which then turns red and the PC doesn’t turn on, doing various tests I discovered that if I don’t insert the RAM in the third slot all works fine but obviously I lose 8GB of memory, i tried to reset the CMOS by removing the battery for 10/15 minutes but nothing changed, how can I solve this problem? Why if i remove the Ram from the third slot everything work?

Motherboard: Asus Prime z590-a Prime

Ps: i don’t have a Reset CMOS button so i do it manually.