What causes the computer to shut down after 0

February 14, 2011 at 13:27:23
Specs: Windows 7
What causes a computer to shut down after a long beep on start up? Could it be the processor

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February 14, 2011 at 14:49:34

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February 14, 2011 at 14:52:04
Depends on your Motherboard. Each motherboard has a "Beep Code". If we knew the make and model we could google the beep code.

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February 14, 2011 at 19:02:23
Normally only overheating of the CPU will cause the computer to shut off and stay off rather than Restart.

If that's what it's doing
- when the mboard shuts off, the computer will not start up at all, or it will start up but it shuts off again within a few seconds, until the CPU has cooled to below some temp.
- if the computer has had a chance to cool to room temp, the computer will start up fine and run okay until the CPU gets hotter than some critical temp, then you'll get the same symptoms again.
- when the computer does work, the CPU temp will eventually be shown as a lot higher than it being in the range it should be within in the bios Setup current hardware monitor readings.

If it is overheating....

if this is a desktop computer.....

Have you been messing with installing the cpu heat sink yourself ?
If so, you may not have installed it properly.

Are you using overclocking settings or higher than default ram voltage settings in the bios Setup? If so, you may have gone too far - back off on those settings or load bios defaults.

Unplug the case/power supply, or switch off the AC power to it otherwise.
Power off your monitor.
Open up the case by removing the left side panel as seen when you're looking at the front of the case.
If the cpu fan/heat sink has mung (dust, lint, etc.) on it, clean it off, but DO NOT use a vaccuum cleaner to do that (they produce a tremendous amount of static electricity when running, and anything connected to them can discharge that to your components) - use canned air, or an air nozzle if you have access to an air compressor, or an artist's brush that can be used in small spaces, etc. It may be difficult to clean the top of the heat sink under the cpu fan - the most likely place to have mung on it - and the bottom side of the cpu fan blades unless you remove the fan. If you have a case fan, clean that too if it needs it.

Also check for mung on the video card fan and heat sink if it has that, and the power supply's openings / fan.

With the cover still off, restore the AC power, start the computer and make sure the cpu fan spins - if it doesn't spin, if you're sure the power supply is working okay, don't use the computer until you have replaced it.
If it spins too slowly, and/or if it makes rattling or screeching noises, most likely to be noticed when the computer has cooled to room temp, has not been used for a while, and then is started up, the cpu fan's bearings are failing - the cpu is likely to overheat as a result of that if it can no longer spin it's full speed - replace it as soon as you can.

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February 14, 2011 at 19:37:53
`Thank you for the inforation. I have downloaded all the Post Bios beep code. I didn't realize there wer so maney,however I may have found the problem.I tested my power supply, and fond it to be bad. I have ordered a new power supply.I hope that will resolve the problem.Thank you for your advise, TC

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February 14, 2011 at 20:00:46
Don't buy an el-cheapo (in quality) PS.
See response 3 in this:

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