I built an HTPC a year ago January. Everything had been going fine until this January. While running XBMC the PC shutdown during a keystroke from the Harmony One remote. After restarting the PC would again shutdown. This was to be due to a return to default settings in BIOS; resetting BIOS seemed to solve the problem for awhile.
The problem I am having now is once I get the PC started (the shutdown has occurred numerous time) and "functioning" (ie, programs function, internet access is fine, etc) the PC (after entering sleep mode) powers down and refuses to restart.
This evening I took the PC (attempt to restart for the umpteenth time) out of the system, checked the PSU with a PSU tester confirming (again) that the PSU is fine. Connected another monitor and, ultimately, got the PC to power up. I reset the Power settings such that the PC would always remain on. This appeared to be stable so I powered down (and turned off PSU switch) and put HTPC back in the HT setup. After turning PSU switch on the PC refuses to start when pushing the start button.
This is driving me crazy. I have exhausted my limited PC and electronics knowledge and would be very grateful if I could get pointed in the right direction.