I've got a real stumper here! Working on this unit for a friend who stated that it wouldn't turn on or do anything. When I got the unit all it did was click when you pressed the power button. I read a thread on here that said it must be the tcon board. I ordered a tcon board and the tv started working. It worked for about 3 days and then stopped again. I ordered an SSB board and power board and replaced both of them. Still didn't work. I put the old tcon board back into the tv and it started working again for about a week. I updated the software and it seemed fine for another week. I went to turn it on yesterday and all I get is a bunch of colored vertical lines, green, yellow, white, purple, blue. I called Phillips and they said it might be stuck in a service mode, but couldn't confirm. Please help! Any ideas?