maybe your graphics died? you say the mobo light is still on so I assume your power supply is still functioning. It also could be a freak case of your video cable dying. It's pretty much damn rare but it happens. No smell would mean nothing burnt but you might want to do a visual inspection to see if any of the capacitors on any of the parts has burst.
funny thing is everything works again. but that entire night i checked everything, all capacitors fine, cables were good, i even took all parts out and gave it a good vacuum and dust off, reconnected everything and tested it didnt work... THE NEXT NIGHT just turned it on and everything works.
But it never powered up the other nite, even after checking everything... weird... Im pressed up agasint PSU faulty or over heated or something