PC Shutting Down at Different Times!!

I currently have PC that I am trying to re-install Windows XP Pro on it. The PC shuts down during different points of the installation. Sometimes when there is 20 minutes left and other times when there is 34 minutes left to install. Needless to say this is frustrating as I can't even get Windows back. When the PC shuts down, the monitor signal is lost, the CPU fan stops but the hard drive light is on non-stop. THe only way to shut it down is to unplug and re-plug. Any ideas what the issue could be?
Derek_W83Asked:
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elgee1000Commented:
are you using an original windows disk?
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slimfadyCommented:
hello,
u can check a couple of things to identify the source of the problem:
1- The CPU fan is working? it could be an overheating problem
2- Your power supply could be damaged, u can try another power supply?
3- RAM overflow problem? this can cause random shutdowns at different times.

good luck
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EikromanCommented:
looks like standby mode.
Check in the bios for Power Save and disable Suspend Mode. (and whatever associated with it)
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winkingtigerCommented:
I have had a problem like that before.  Besides checking for problems listed above by slimfady.  I would try and install a different video card. Just swap it out with another one that you are certain works may help you get to your solution.  

Cheers
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tosh9iiiCommented:
If you don't mind me asking Derek, why are you reinstalling Windows?  In other words, did you have a problem with your computer that made you decide to reinstall Windows, if so then what was the problem?

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nobusCommented:
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kcarrimCommented:
What type/model mainboard do you have? The system health monitor in the bios may be set to shutdown the system on fan failure or cpu overheating. As mentioned, check your cpu fan and check bios reding for overheating.
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nobusCommented:
A question : is it a clean install with formatting or an re-install over the existing one?
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Derek_W83Author Commented:
To elaborate on everyone's questions above. The computer is an E-Machines T1840 so it has everything integrated on the motherboard (network card, video card). Except the modem. The reason I am re-installing Windows XP Pro is b/c the machine was shutting down intermittently and I thought it was a virus.  The installation is clean. I will try some of your solutions and give you an update.
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kcarrimCommented:
Is this what you have or something similar?
Microsoft Windows XP Home Edition pre-installed
Intel Celeron 1.8GHz processor
128MB DDR RAM
40GB hard disk drive
40x12x40 CD-RW drive
16x DVD-ROM drive
Intel Extreme Graphics (845GL shared)
AC '97 integrated audio
56K ITU v.92 ready fax/modem
10/100Mbps integrated Ethernet
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kcarrimCommented:
You may need a mainboard replacement.
eMachines gives only a 90 limited warranty:Repair or Replace on mainboard.

Find it here:

http://parts.emachines.com/emachines/moreinfo.asp?product_id=68915
http://parts.emachines.com/emachines/sys_lookup.asp
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