A friends LG TV turned off fine, but now when it is turned on the power light flashes red, white then stays white as if the screen is on, but there's nothing on the screen. It's a 37LG6000. A quick search has brought up numerous PSU issues, so I'm guessing it's something to do with that. Bit of a bummer as we were going to have a movie night! Anyone got some tricks I could try to get it working again?