I'm having trouble with my PC all of a sudden. I decided to do the dreaded move around the desk and clean everything trick because things were getting dusty. The computer was working fine before. After putting everything back together, my computer will no longer start up. When I attached the power cord it made a click, followed by a quiet, continuous high pitched noise coming from somewhere (power source maybe?). When I try to power it up, all the fans and lights kick on for a split second, then stop. Three seconds later, they try again and stop, and again and again til I pull the power cord.
I didn't do anything to the PC itself while I was cleaning, just moved it and reconnected everything. I tried putting the power cord into various outputs thinking that could be it, but it didn't help.
Sorry if this is an easy answer or already posted, a Google search proved that finding specific issues was like a needle in a haystack.