i have a problem where yesterday my pc is working fine used it all day. but today when i turned it on it started beeping 5 times and not showing display then after a while the fan will go full speed. tried reseating and cleaning the ram but its still the same. also tried putting rams on 1 and 3 slow and 2 and 4 slot but still no success. but when i tried putting only 1 ram on slot 1 the pc will turn on normally. what can be the problem here? should i try reseating cpu or is there a problem with the motherboard or cpu? the pc is fairly old which is hp elitedest i7-4th gen. also my rams are all the same brand and model which is adata.