Ran thinkvantage system update and after completion, system went to reboot but will not boot. DVD light flashes several times but nothing happens after that. Any ideas?
When you ran TVSU, what updates were selected? I would suspect that you might have received a BIOS update and that perhaps it glitched and hung the system?
You are saying you get no display at all on restart, even after completely powering off the system?
If that is the case, I'm guessing it was a BIOS flash that didn't work out. Check the hardware maintenance manual for this system and see if there is a jumper on the board you can use to clear CMOS and recovery. See this article on the support site.