Lg 52" DLP won't come on.

call up the menu for the Guide and turn that off.

Check all inputs. Make sure they are properly connected and all of them are giving you this static. If this is the case you have a bad audio circuit in your TV. The odds are that your signal is bad though. Also try lightly slapping your TV to see if there are any bad connections. The sound should come in and out if this is the case.

turn on video mode if loud humming still occurred replace filter capacitor on audio section from your tv ckt board.

Could be serious...but first check the screen modes (for split screen, format, etc) to be sure the tv is set up properly for the picture you are trying to watch. Switch the input to a DVD or something similar. Is it the same? If not, you have a mode/resolution problem with the tuner and perhaps some other device.

check your scart male connecter ends are pushed all the way in.

Check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Pull up older posts.

you may have had a power surge

If you have pets check your cables and make sure they haven't been chewed on or pulled out or even loose.

Mitsubishi gives this error , when it does not detect a video signal.....Check your wiring.