This one's got me a little stumped. Just happened yesterday for the first time. If I turn the home rig on, everything power up like normal, except there is no video output to the screen. If I hit the reset button and power buttons enough to make it finally turn off, the next time I press the power button, it fires up normally, this time with video output to the monitor.
It's done this twice now.
Any ideas? Both GPU and PSU are pretty new - about 2 months old.