Can't get my system to POST

Good morning all,

2 days ago I turned on my monitor to do a bit of work on my computer, the PC was already powered up and sitting at the desktop but it had locked up. I didn't think too much of it and did a hard reboot. Unfortunately when I rebooted it my monitor went to standby and the computer won't POST so I'm unable to do anything with it. I then left the system powered off for a few hours and tried again but got the same results.  
When I hit the power switch all the fans start up, lights on my case turn on but nothing else. I don't even get any beeps when I power it on so that rules out the troubleshooting from that end.

Things I've tried so far:
1) 2 different power supplies
2) Re-seating the CPU
3) Removing both my memory modules, then trying one of them at a time (system still doesnt beep when I power it on without ANY memory present)
4) Removed my Gfx card (Radeon 9800) and my Soundcard then powering on
5) Disconnected all IDE devices and then powering all
6) Tried a different monitor

All of the above gave exactly the same results as before so my only guess is that either the motherboard is dead or the CPU has died but I'd like some second opinions from you guys.
Motherboard is a AsRock K7S41 with an Athlon XP 3200

Many thanks
TorraAsked:
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Irwin SantosConnect With a Mentor Computer Integration SpecialistCommented:
well...seems like you've come to a head..

motherboard or cpu...no audible sound would limit the final choices to those 2 mentioned items.

Got another CPU lying around?  Perhaps your local computer store and test the CPU,if it works, then your mobo is bad, if it doesn't then it's the CPU.
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Danny ChildIT ManagerCommented:
Have you tried booting with the onboard graphics card
this
http://www.asrock.com/product/K7S41.htm
says there is one...

poss either fried your graphics card, or the software is up the swannee...

do you get any "normal" booting sounds from the hard disk?  
hth, Danny
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TorraAuthor Commented:
Well I've just tried my CPU in a mates computer and it booted up fine so I'm guessing its a dead motherboard in my system. Anyone else with any other ideas before I head off to the shops for a new one?
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TorraAuthor Commented:
Danch99, yeah I've tried booting from both Gfx cards, forgot to say in my original post that I tried clearing the CMOS to see if that made any difference so have tried connecting the monitor to both card connectors.
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CallandorCommented:
I agree with the motherboard being dead - a working cpu and working motherboard should give you beep codes at least, and that would be a minimal system.
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TorraAuthor Commented:
Thanks for all your comments, I've got a new motherboard on order. I wasn't sure who to give the points to as the three of you were equally helpfull so I've just assigned them to the person that replied first. Hope this doesnt cause any issues
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Irwin SantosComputer Integration SpecialistCommented:
Cool thank you!  Generally, you accept the comment that is the best & most exact choice. Here is a guide for you to follow
http://www.experts-exchange.com/help.jsp#hi68

Aloha from Hawaii,

Irwin
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CallandorCommented:
I have no problem with that - I just wanted to reinforce the conclusion already arrived at.
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