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Computer shuts down unexpectedly

By milwaukeebear ·
I have a most unusual problem with my Systemax Legend with an AMD Athlon 1.2 ghz processor. The machine is equipped with Windows XP Home Edition. The computer will shut down unexpectedly and without warning, with no provocation and no specific software running. The computer cannot be successfully restarted for at least an hour after each occurrence. I had Windows XP installed specifically hoping that it would help any "instability" problems, along with new CD-ROM drives, and a new hard drive. None of these upgrades have assisted. The machine has even come back ON without warning after having been powered down after one of these mysterious shutdowns. Does anyone have a clue what the problem might be? When the machine cuts out, the machine gives off it's distinctive "click" (just as it does during normal shutdown) and the hard drive light comes on and stays on. I always power down the machine immediately, but again it won't restart successfully for at least one hour after it's been powered off. Any insights you may have would be much appreciated!

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Computer shuts down unexpectedly

by bennettnb In reply to Computer shuts down unexp ...

Judging by the randomness, I would first suggest checking cables/connections to make sure they are snug. I would then replace the power supply. This is where I would start.

Good luck!

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Computer shuts down unexpectedly

by milwaukeebear In reply to Computer shuts down unexp ...

The problem ended up being that the computer was built without a CPU fan, only a processor and power supply fan. Unbelievable! I have taken care of the problem and the computer has worked flawlessly since. Thanks to all!

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Computer shuts down unexpectedly

by mightyyoungfai In reply to Computer shuts down unexp ...

You are mentioning that fews hard drive upgrade, what was it? If it is ram, maybe you want to consider the incompatible between your old ram and the new ram.

If it is not the problem starter, then i suggest you to change the motherboard. and thensee if it helps or not. Final test, try to upgrade the processor to higher speed or buy just buy a new one.

Hope this will help.

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Computer shuts down unexpectedly

by milwaukeebear In reply to Computer shuts down unexp ...

The problem ended up being that the computer was built without a CPU fan, only a processor and power supply fan. Unbelievable! I have taken care of the problem and the computer has worked flawlessly since. Thanks to all!

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Computer shuts down unexpectedly

by djent In reply to Computer shuts down unexp ...

It could be a weak power supply or a connection problem induced by heat. Get some good contact cleaner, spray every connection in use. If problem persists try a different power supply, preferably 300 watts or more.

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Computer shuts down unexpectedly

by milwaukeebear In reply to Computer shuts down unexp ...

The problem ended up being that the computer was built without a CPU fan, only a processor and power supply fan. Unbelievable! I have taken care of the problem and the computer has worked flawlessly since. Thanks to all!

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Computer shuts down unexpectedly

by Willicueva In reply to Computer shuts down unexp ...

This seems to be a motherboard problem related to heat. Sometimes there are soldered connections on the motherboard which can expand and therefore cause a short when the PC gets hot. These are very difficult to find and usually cannot be corrected. I had a similar problem with a PC which simply locked up. After I changed the motherboard, the problem went away.

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Computer shuts down unexpectedly

by milwaukeebear In reply to Computer shuts down unexp ...

The problem ended up being that the computer was built without a CPU fan, only a processor and power supply fan. Unbelievable! I have taken care of the problem and the computer has worked flawlessly since. Thanks to all!

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Computer shuts down unexpectedly

by TheChas In reply to Computer shuts down unexp ...

The other answers are all good possibilities.

I have had several different Socket A motherboards give me "strange" problems, with power up being the most common.

The fix for all of these has been to manually set the CPU FSB and multiplier in BIOS settings.

Some Socket A motherboards set the FSB and multiplier incorrectly. For whatever reason, AMD CPUs do not like to run if under-clocked.

I believe that the 1.2GHz Athlon comes in 2 flavors. You need to determine if you have the 200MHZ or 266MHz FSB version.

200MHz FSB version:
For SDRAM, the FSB should be 100MHz
the multiplier 12X

For DDR RAM, the FSB should be 200MHz
the multiplier 6X

Chas

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Computer shuts down unexpectedly

by milwaukeebear In reply to Computer shuts down unexp ...

The problem ended up being that the computer was built without a CPU fan, only a processor and power supply fan. Unbelievable! I have taken care of the problem and the computer has worked flawlessly since. Thanks to all!

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