Solved Cannot restart computer after sudden shutdown

October 8, 2013 at 11:50:32
Specs: Windows XP
I was working when my computer had a sudden shutdown, like when a power failure occurs (no blue screen). When I try to restart, all that will happen is that the two fans and the start button light will come on, but no sound from the hard drive or anything coming up on the monitor. The DVDs will open but that is all. When I try to shut down with the power button the fans will not turn off; I have to unplug it to shut down again. I have checked all connections and seemed to be OK.

This has actually happened twice, the first time seemed like it was a connection problem because it started like normal after reconnecting everything. But after the second failure I just get the fans running when I try to start up. Any ideas? Thanks.

9 yr old Sony PCV-RS430G, Win XP, Pent 4, 2GB RAM, FX-1000 graphics.

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October 8, 2013 at 20:41:20
If this is a desktop, it is probably a power supply failure. If you are able to try the system with a known good power supply you or a friend may have or can borrow from another system, that will the definitive proof.

You have to be a little bit crazy to keep you from going insane.

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October 8, 2013 at 21:03:15
✔ Best Answer
Even thoiugh the power supply is able to run the drives and light up the LEDs that doesn't mean it's good. It must supply several different voltages as sufficient current for the motherbaord to fire up. It could also be the motherboard or something connected to it. So with the power cord removed, first disconnect all the drives and remove all add-on cards--except the video card if you're using that instead of on-board video. Then plug the PC back in and start it up. If you get the logo or posting screen then one of the disconnected items is likely at fault.

If you still get nothing, examine the electrolytic capacitors on the motherboard. They're shaped like small soda cans. If they appear puffy like they're about to blow up or have dried residue on top indicating leakage then they're bad or going bad and that might be the problem. Bad capacitors were a problem especially with older motherboards.

If you have a known working compatible power supply available you can try swapping it in place of your existing one.

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October 9, 2013 at 11:48:30
Fingers and DAVEINCAPS, thanks! I'm zeroing in on the power supply, but I am a little worried about the motherboard too. I'll try to test it tonight when I get more time by disconnecting the drives and add-on cards. Thanks again.

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