|If, as Derek suggested earlier, it is booting up then the screen must be blanking out for some reason. You say you don't have another monitor to test it with but try attaching the monitor you have to whatever computer you're using now (the laptop?). Then see if the monitor is acting right. If the monitor seems to be OK then maybe it's the video adapter. If you're using the on-board video try adding a video card--even a cheapy--just to see if it boots past the logo. If you're already using a video card either remove it and use the on-board or try another card.|
Also, if it is booting up you should be able to hear those stupid windows startup sounds even if nothing shows on the screen. As far as you know are the sounds enabled? Are your speakers connected and powered up?
Anyway, the above should clear up whether the video adapter or monitor is involved.
There might be a key to switch to the diagnostic posting screen instead of just showing the logo. Often that's the TAB key. Try that as well as ESC when the logo is showing and see if the posting screen pops up. If so, maybe you'll get an error message that will somewhat explain what's going on. Also, if you need to slow things down you can use the PAUSE key.
Lastly, did anything happen to it or did you make any changes to it between the last time it worked OK and the first time it didn't?
DAVEINCAPS - Wandering aimlessly since All My Children was canceled.