PC Shuts Down shortly after Windows loads

I am trying to fix a custom PC. See specs below. The PC wouldn't turn on a month ago and I have finally hit a road block in fixing it. So far I have replaced the power supply with an APEVIA ATX-AS500W-GN 500W ATX this brought power back but alerted me to a broken system fan on the motherboard. I replaced this with second hand 1.5 inch fan that is using the new power supply (so I can tell you any speeds). Next Window XP 64-bit will run for 2 minutes max and the whole thing shuts down. Here's the rub, I've been in the BIOS and pre-boot menu's for up to 15 minutes, the CPU temp doesn't go above 32C, but as soon as Windows loads it shuts down shortly after. I have the tower out in the open the fans arn't being blocked, I've cleaned out all the dust. What can I do.

Note: The Samsung drive is the only HD running due to a bad STA cable.

- Pioneer DVD Burner Black IDE Model DVR-109
- SAMSUNG SpinPoint P Series SP1213C 120GB 7200 RPM SATA 1.5Gb/s Hard Drive
- Microsoft Windows XP Professional X64
- Creative Sound Blaster Audigy ES SB0162 5.1 Channels PCI Interface Sound Card
- AMC 8 inches 4-Pin Power Cable Splitter Model Y Power Cable
- APEVIA X-Navigator ATXA8NW-AL/500 Silver / Black Aluminum ATX Full Tower Computer Case 500W Power Supply
- BIOSTAR NF4UL-A9 939 NVIDIA nForce4 Ultra ATX AMD Motherboard
- AMD Athlon 64 3200+ Venice 2.0GHz Socket 939 Single-Core Processor Model ADA3200BPBOX
- Leadtek A400 GT TDH GeForce 6800GT 256MB 256-bit GDDR3 AGP 4X/8X Video Card
- Seagate Barracuda 7200.9 ST3200827AS 200GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM

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Bare Bones

by NormH3 In reply to PC Shuts Down shortly aft ...

Anytime I have had an issue like this, I tear the unit down to bare bones. Remove any cards or devices not required to boot Windows. If there are multiple sticks of memory, remove all but one. You might even try booting into SAFEMODE during the troubleshooting period.

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Well I think that this is a waste of time but

by OH Smeg In reply to PC Shuts Down shortly aft ...

You can try booting with a Live Linux and see how long the system runs. If you don't currently have a Live Linux you can either go to your local Newsagent and buy a Linux Mag with a Live Linux as a Cove CD or download one from here

If you do a lot of PC Repairs download Knoppix it's just more useful in dealing with Broken Window Systems.

But what I think you'll find is that something in Windows is Damaged or Corrupted by the constant power outages from the previous PS. If you have the 64 Bit M$ Branded Install Media you can perform a In Place Install by following the directions here

This requires a M$ Branded Install Disc as apposed to a System Makers Recovery Disc though. If you only have a System Makers Recovery Disc you'll need to reload from scratch. Though you could try starting in Safe Mode nd make a new User Account and see if that cures the problem by starting normally and loading the new User Account.

But you should make sure to Backup all of the Customers Data First just in case something goes wrong during the reload. :)


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by C_DOT_COM In reply to PC Shuts Down shortly aft ...

I unplugged each hardware piece and couldn't find a fault while booting. I was unfortunately unable to save one of the hard drives. I have formatted the remaining working hard drive, and the pc still shuts down in the middle of the OS install. Oddly enough when I turned the computer on again it loaded to the middle of the install where power failed.

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The Install is smart that way

by Slayer_ In reply to update

System Crashes are frequent, thanks to unmonitered installs, they resume where they left off.

Try running memtest on it for a couple hours, see if it shuts down.

Almost sounds like a bad Video Card.

In re-reading your post, I feel I should mention In my time, I've had 4 nVidia 6600's mysteriously die on me, and 2 6800's. In all cases, just suddenly the machine woudl start restarting over and over, sometimes it would last a few seconds, sometimes it could boot to windows, sometimes it would get passed POST and restart again.

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by C_DOT_COM In reply to PC Shuts Down shortly aft ...

I have replaced the video card with a cheap fanless option to get the computer up and running. Now the computer powers up but doesn't run through the BIOS. There are no beeps to trouble shoot. I have tried unplugging he PSU and removing the mobo battery to no avail.

Any Suggestions?

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Reseat the CPU applying new grease

by Jacky Howe In reply to Update

Power Supply
A common problem is the System mysteriously shutting down, especially when playing games. This is often caused by the Power Supply being Overloaded, these safety measures ensure that it automatically shuts-down.
Over-voltage Protection
Short-circuit Protection
No-load Operation
Over-current Protection
Over-temperature Protection (Optional) Not all PSU's support this feature

If you are experiencing these problems you can test your PSU using the instructions below or purchase a more adequate Power Supply. Do a Google for Antec brand PSU's as they are by far the best quality.

<a href=" " target="_blank"><u>testingPSU</u></a>

<a href=" " target="_blank"><u>psuvolt</u></a>

<a href=" " target="_blank"><u>powercalc</u></a>

Central Processing Unit
Faulty Fans, Dust and Grime build up on the Heatsink restricting air flow. Remove the Power cable from the rear of the System and disconnect the Video cable. I would give the inside of the case a blowout with compressed air. When blowing air through the fans make sure that you physically stop them from spinning, as they may generate power and damage something. Use an Anti-Static Wrist Strap to ground yourself or by placing the back of your hand on the Power Supply Unit and not moving your feet. This will prevent electrostatic charge from building up and by not taking this precaution it is possible that you could inadvertantly cause damage to the PC from an electrostatic discharge.

Then remove the Heatsink, giving it a thorough clean and reseat the CPU applying new CPU grease. If the Fans spin freely when you give them a spin they are probably OK. If there is resistance replace them.

Clean the golden edge of each memory stick with a soft rubber/eraser, remembering not to touch the golden edge of the memory stick. Check with one stick at a time, remembering to disconnect the power from the PC.

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