If the CPU fan does nothing, and the CPU fan is plugged into the mobo... it's gotta be a problem with that (the mobo)
Hrm, on my P4 mobo I have the standard power and a 4-pin "booster" power that needs plugging into it, too. Dunno if your mobo needs anything like that.
Also, if my AGP isn't quite push in properly it won't boot up either. Could be a component (gfx card, RAM, etc) not quite pushed in properly?
The VGA molex should be going into your graphics card, if your graphics card requires its own molex.
Umm... Try taking one stick of RAM out and running with just one, then swap to the other stick. Could be a dodgy stick of RAM?
All else fails, I guess you could take your processor out and make sure you haven't bent a pin whilst putting it in? If you find you have bent a pin, CAREFULLY bend it back straight with a niddle, whilst keeping yourself earthed. Try not to bend the pin around too much or it'll snap.
Try unplugging unnecesarry components one-by-one (or all components to see what happens!)...
Other than that, an out-of-case build like (someone) suggested is a good idea - do it on a wooden surface or something though, not on material (sofa etc!) or anything likely to have a static charge!
Good luck with it mate, I can understand how dissapointing these things are but I hope you get it sorted
You always got these forums to help you on your way to success hehe

Hrm, on my P4 mobo I have the standard power and a 4-pin "booster" power that needs plugging into it, too. Dunno if your mobo needs anything like that.
Also, if my AGP isn't quite push in properly it won't boot up either. Could be a component (gfx card, RAM, etc) not quite pushed in properly?
The VGA molex should be going into your graphics card, if your graphics card requires its own molex.
Umm... Try taking one stick of RAM out and running with just one, then swap to the other stick. Could be a dodgy stick of RAM?
All else fails, I guess you could take your processor out and make sure you haven't bent a pin whilst putting it in? If you find you have bent a pin, CAREFULLY bend it back straight with a niddle, whilst keeping yourself earthed. Try not to bend the pin around too much or it'll snap.
Try unplugging unnecesarry components one-by-one (or all components to see what happens!)...
Other than that, an out-of-case build like (someone) suggested is a good idea - do it on a wooden surface or something though, not on material (sofa etc!) or anything likely to have a static charge!

Good luck with it mate, I can understand how dissapointing these things are but I hope you get it sorted

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