LG RU-52SZ51D problem turning on

is it by chance the "lamp" light thats turning on and off? you may have a lamp out and need replacing most of the time this is the cause..

See if Lamp Fan is running it can be defective and if Fan is OK it will be Ballast Board, Call Encompass Parts 1-800-638-3328

replace lamp

A temp problem? First check all the fans and make sure they are free from debris or check to see if they are spinning.

it is def. the lamp. I have the same tv

If the second light is blinking to orange or red, that is usually the lamp indicator light on an LG DLP tv. That indicates your bulb needs replaced, or something surrounding the bulb has failed (like the cooling fan for the bulb for example) IF you have a spare bulb handy, I'd replace the bulb, keeping in mind if you touch any part of a new bulb with your bare hands, you just cut the life of the bulb by more then half.

On my unit there's a panel on the lower right hand side, remove the 2 screws with a screw driver. Inside you should see a compartment that is metal and has a thin metal handle. Remove the Black screw on the top left hand side. Then pull the unit out with the handle. Inside the unit holds the bulb, just replace and go through these steps in reverse to place back together.

Hi lovelace Check your power supply module it needs to be replaced.good luck

Sounds like it may be a bad ballast

Hold down on the Enter or OK on the TV and Mute on the remote control for 5-10 seconds. The TV should then ask what you want to do. Perform this with the TV on.