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Computer shuts down after a few seconds


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#1
sassenach

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hi,
i have a computer here which i cleaned with a computer dust spray. my family member was complaining it makes a lot of noise. i noticed the pcu fan was so dusty, i cleaned it with the spray.

when i was done, i started the computer and i get this continious long beep. i get to the post stage and sometimes i see the win xp loading (or safe mode), then the computer shuts down.

i took out the fan again, placed it back. still nothing.
i took out the RAM, placed it back and still nothing.
i took out the battery, places the RAM in a different slot, and the computer loaded without the beeping sound, but it still shuts down after about 20 seconds.

any ideas?
thanks

Read more: "Continious long beep, then computer shuts down" - http://www.computerh...h...0FevCwcNL
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#2
SRX660

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Single long beeps are always memory related. Replace the memory with known good memory( have it tested first).

SRX660
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#3
sassenach

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i placed the memory in a different slot and it does NOT beep any more.

it still shuts down after a few seconds. i do get to the windows loading either safe or normal mode, then it shuts down.

from my testing, when i unplug power cord to the ATX_12V on the motherboard, the computer does NOT shut down, but obviously the system will not start. When i then plug in the power cord to the ATX_12V on the motherboard, the computer shuts down sometime when the windows tries to load, either normal or in safe mode.

when i cleaned the computer i took out the CPU fan to clean it with the spray because it was way dusty. i am not sure if after plugging it back in caused this mess.

??????
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#4
happyrock

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is the 4 pin AUX CPU power connector plugged in...did you remove the heatsink...if so did you replace the thermal paste..how to is here..
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#5
sassenach

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ok so i bought thermal paste, i reapplied.
i also bought a new PS.

after all that, i do reach the windows loading screen, but then it shuts off.

any ideas???????????????????
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#6
happyrock

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can you get to the bios...usually by pressing the delete key as soon as you power up...
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#7
rshaffer61

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Sounds like a short with MOBO or CPU is not seated correctly.
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#8
sassenach

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so i solved the problem thanks to all of you.

1. the PS was not strong enough, so I bought a good one (550w), not a generic brand.
2. i reapplied thermal paste.
3. changed the cpu fan.

that did the job.

windows is now working and the computer is nice and quiet.

thanks for your help
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#9
happyrock

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glad you got it working...your welcome...and thanks for letting us know... :)
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