So played around with Dynamic Refresh Rate. Something I'm now regretting. Watched video and DRR reset refresh rate to 23.976.When video stopped, refresh rate went to NTSCHD. Everything good so far. Turned on TV and screen went black. Best I can tell is that MP set the graphics driver to a frame rate my TV doesn't support. I hooked up the computer to other monitors. No problem there. Only way I could get the computer to work again with the TV was to restore back to a previous restore point. Noted that I had to unistall/reinstall Norton IS. MSQL 5.6 seems to be broke and I don't know enough about it to get it to work. Need help!