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PC turning off instantly

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Name: brownhead
Date: March 8, 2004 at 07:04:06 Pacific
OS: XP
CPU/Ram: AMD TBird 800Mhz / 256MB
Comment:

This is a wierd one guys. Push the power button and power led and fans turn on for a split second and then shuts off immediately. Tried changing the power supply and same deal. Have a few things I wanna try but want to see what you guys think first....thanks




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Response Number 1
Name: zer0_down
Date: March 8, 2004 at 07:25:08 Pacific
Reply:

check the wireing for the power button, the mobo handbook shud tell you if there right or not,

Is it a new computer or did it work fine until it started to not power up.


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Response Number 2
Name: brownhead
Date: March 8, 2004 at 07:32:36 Pacific
Reply:

This is not a new build it worked fine all these years. Only thing I did was change the fan which I think is the culprit. I am going to try and see how it goes with the old one.


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Response Number 3
Name: robdos
Date: March 8, 2004 at 08:51:52 Pacific
Reply:

which fan did you change?


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Response Number 4
Name: Robertt
Date: March 8, 2004 at 09:21:28 Pacific
Reply:

I believe it is the motherboad that is bad! (I had same problem before).
Replace the mobo with one that supports your processor.

Let us know if you need any more help.

Robert


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Response Number 5
Name: jam
Date: March 8, 2004 at 09:34:38 Pacific
Reply:

You didn't mention which fan you replaced, but if it was the HSF & now you're having these problems, you probably installed it wrong...the CPU is overheating, & the motherboard is shutting down to protect the CPU from burning up


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Response Number 6
Name: Tubesandwires
Date: March 8, 2004 at 09:48:14 Pacific
Reply:

The fan you are trying to use may not be providing the rpm readout the hardware monitoring chipset on your mboard can read, or expects.
See
http://www.computing.net/hardware/wwwboard/forum/23028.html


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Response Number 7
Name: trivalleypc
Date: March 8, 2004 at 16:02:01 Pacific
Reply:

Take a quick look at your motherboard. There are several capacitors right next to the CPU. Does it look like they're leaking? To tell; look for black crud either on top of or on the bottom. They will also possibly look deformed. Here is a link with more info. if so....

http://www.motherboardrepair.com/index.php?sec=home

Dave


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Response Number 8
Name: brownhead
Date: March 10, 2004 at 05:29:21 Pacific
Reply:

Sorry for the late response fellas - so I tried installing the old fan and the same thing happens. Everything (including the cpu fan, which I replaced) comes on for a second and then powers down itself. I'll check on those capacitors next to the CPU. Thanks again for all your help on this. Will update later


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