Well, I was just watching it and it went off. No power at all. I've unplugged it and still no power, lights or anything. Any ideas of what is going on? This is a very heavy TV! So, if there's a repair... could I fix it? i.e. how complicated is it? Any advice is appreciated! Thanks in advance!

In televisions there is some Very High Voltages. I would unplug TV, follow the power cord in and look for fuse. May not look like a fuse, on circuit board, part # will start with F (for fuse). Hopefully it blew because of a spike, If fuse blows again, more involved troubleshooting will be needed.