For the Mobo installation, check if you have connected "on/off" switch correctly. Some older systems switch on and of directly from PSU, while today's systems switch is connected to the motherboard. It usualy means shorting 2 pins.
For troubleshooting the newborn custom made machine, the prudent thing to do is to install the beeper. It can "tell" you why it won't turn on.
Also having a IDE HD cable plugged in upside-down would result in such behaviour.
I suggest that you start with PSU-CPU-MOBO only (no drives, cards VGA or memory) to see if it would move from square 1.
For the monitor:
Monitors usualy have 3-5 year warranty, so tf it is 2 yrs old than the warranty should cover it. And I'm 100% certain that it is faulty. That burning smell you described is comming from your monitior. A broken solder would make sparks that produce smell.
If the warranty is gone I suggest that, if you feel brave enough, to openup the birthday gift (I mean monitor) and look for the burn-marks. My bet is that you'll find cracked solder with brownish surroundings. You might need a magnifying glass if the solder is small.
You'll need soldetron. Just touch the cracked solder till it melts a little and you're done. I did that to my ex monitor couple of times and prolonget it's life for couple more years. And I'm not a crafty electritian.
BE SURE TO UNPLUGG THE MONITOR AND SWITCH IT ON AFTER YOU UNPLUGG IT.
Or you can allway get it to the nearest service. Won't cost you arm and a leg.
In the mean time try another monitor.
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Posting Virtuoso
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since May 2006