Originally Posted by
spekesoftly
That sounds a good idea - random changes as discussed sound like a hardware problem to me - or as mentioned interference.
Also if there are any long cables perhaps don't have the spare cable neatly coiled up or anything like that. Don't want to make an accidental antenna. As a test remove any cables not essential for basic operation and see if the issue goes away.
Capacitors in power supplies can be dangerous and will kill you. If the power supply is not fully enclosed as in a traditional desktop PC best leave whole thing alone and miss the next bit.
Otherwise take lid off and re-seat any connections/chips that you can see. Don't use mad force and break stuff. Many memory modules are easy to remove - take out one at a time and re-insert. If connectors come off easily enough remove one at a time and replace. If any chips in sockets don't try to remove unless you have the correct tools but press in, however not hard enough to break anything. Play safe - if in doubt leave it alone. Don't fiddle with any connectors that you don't understand - there are many, many different designs in use now and it is easy to screw up.