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Likely the Motherboard?

I have a school lab of 17 Dell Vostro 200 Desktop computers. These are the types of computers that when powered on, all fans run loud for a second or so and then the computer posts and boots. I came in today to find one of the computers in that state just prior to POST, fan running loudly. This is all I can get when the computer is powered on; it doesn't even make it to the POST stage, so I'm not getting beep or light codes, as I have seen with a few others in the lab when they were experiencing other issues.

I have already removed/reseated the CMOS battery, re-seated all the memory, and reseated/re-silvered the processor. Before I call it a mobo issue, I wanted to find out if there are any other ideas from anyone that I could try? I wish I had one of those POST cards that tell you what's going on, but I don't (maybe it wouldn't tell me anything anyway since it doesn't even appear to be making it to that stage?).

Any ideas, anyone?

Dell Vostro 200
Vista 32-bit OS SP2
Intel Core 2 Duo E4600 2.40 GHz
3 GB

All help is appreciated! Thanks!
1 Solution
I know it may sound wierd but try another power supply. Have seen them do this before.
Also double check connections to hard drives and cd roms etc. Seem some strange issue with slightly loose cables before
This is most likely an issue with bad capacitors on the board. Visually check the for leakage, bulging or cracking signs. The Link below shows some examples:

NCDebbiAuthor Commented:
Thanks for your help. I swapped a known good ps and it came up. Thanks, perfectpc!

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