Ugh, its off again. Same as before. I checked the cables,everything was ok. Unplugged everything and ran the plug and computer cable from my other monitor (which is working fine) with no luck. Plugged in the HDMI and ran that to the PS3, no good. Heard thunder here tonight and turned everything off, and unplugged it. We never lost power, never flickered. I'm gonna leave it unplugged and unhooked for the night and maybe magically, again, it'll turn on tomorrow. I'm going to contact Samsung and see what they say, maybe have it repaired, or just buy a new one if it costs too much to repair.