I have a LG 42LB5D LCD.
While watching the NCAA championship game today, my picture went out. I assumed it was my cable box, so I restarted it. Once it was done rebooting, I tried to turn the TV off with my remote but nothing happened. I then tried to change the channel and input source, and tried to bring up the menu screen and nothing happened (this was all with the remote). I then tried all the same things manually and nothing. The TV is registering the commands because the green LED light is flashing whenever I enter a command, with the remote or manually, but nothing happens. I just get a black screen with the "No Signal" graphic.
I've unplugged all cables that were connected to the TV (HDMI, Chromecast, Wii sensor) including the power cord and let the TV sit for over an hour. I reconnected the power cord and it turned on by itself; still stuck on the "No Signal" screen, and not registering any commands through the remote or manually.
I hope I this can be fixed. I've had the TV since 2007 with no issues.