Hey all - strange issue here with my homebuilt PC which is maybe five years old, upgraded regularly. A couple of weeks ago my PC had to restart, and got as far as the windows loading graphic, then shut off. I opened the case and fooled with some wires, and after several attempts at restarting, it finally booted all the way.
Huge storm last night, and we lost power - this morning when I went to restart, it booted for about 2 seconds, then shut off - nothing even came on the monitor. Did this over and over. I started it up and then hit reset, and it booted for a few seconds this time before shutting off. Restarted and immediately reset, and it went farther and farther each time. Finally got to where it would actually bring me to the desktop and play the startup sound, but then I heard that same "click" of it shutting off - the little loading circle would still spin, mouse moved, and desktop still showed, but it wouldn't get any farther. One or two more of these cycles got me to the fully-loaded desktop, and it worked fine.
Also, since this problem began, or two occasions it's gone to the BSOD accompanied by a very unpleasant buzzing sound instead of the Pandora I had been enjoying.
I did give the case many good shakes to be sure there wasn't a loose screw causing a short; also made sure all the cards were well-seated.
I agree with anonymous1.. it's probably the PSU, but "fooling with some wires" making it work, makes me think that some motherboard or hard drive connection may not be securely attached. So before running out to buy a new PSU, make sure all PSU connections are firmly attached, check the I/O switch is all the way to I and that the power cable is firmly connected on both ends particularly to the PSU.
Will do. Many thanks, all - am I right in that my first course of action would be to unplug and replug all power supply cables? Then if it still happens, replace PSU, then test other components if failures continue?
I really, really, really appreciate the help. Really. A lot.
Just ordered that one! Can't thank you enough, guys.
Right on time thetastycat... now that connections are double checked and capacitor damage has made itself evident, according to what I've researched, the likely cause is the PSU. Capacitor damage can ocurr due to overheating caused by fan low speed due to diminished DC voltage, or by overheating capacitors due to oversupply of DC voltage. So DC power fluctuations can damage capacitors and components when they don't get the regulated DC voltage they are made to run on.
Power surge protectors may controll AC surge but not DC surge. That can happen when a bad PSU is not able to properly regulate DC power. Other component damage is (or was) on the way; the youngish motherboard (bulged cap is a start), the older hard drive, anything that needs a steady supply of DC volts can suffer damage.