My RCA 42 " LCD Is crazed. i USE THE REMOTE TO TURN IT OFF AND ABOUT A MINUTE OR 2 LATER IT AUTOMATCALLY TURNS ITSELF BACK ON. THE ONLY WAY I CAN KEEP IT OFF IS TO UNPLUG FROM POWER SOURCE. IS THERE A SETTING I MIGHT NEED TO RE-SET AS MY SON WAS PLAYING WITH THE REMOTE WHEN THIS ALL STARTED.

disconnect things one at a time to find out if set, box or what is causing this----this can actually cause damage to the set.

Check the power source?Try unplug,replug tv an hour later.Let the tv resetting itself back to factory setting.The tv should work now.No,LCD tv have common problems power supply board died alot.This tv is new,call Sharp for warrenty repair.

Do you have the tv connected by any scart connections.
If so turn them of 1 by 1 as the scart can control the tv in stand by.
Also when you turn of remove the batteries from the remote if this cures your problem replkace the remote

IF YOUR IMAGE IS ALL WHITE YOUR LOGIC BOARD IS DEFECT BUT IM SAD TO SAY DO NOT REPLACE THE LOGIC IT WILL ONLY TEMPORARLY SOLVE THE PROBLEM THE PANEL IS OVERLOADING THE LOGIC BOARD PANEL IS BAD

Unplug the TV from Wall, wait a bit and plug back in. Should be reset.

There can be several causes for this, few of which you can do anything about. However, a few things to try:

1) Replace the batteries on your remote control.
2) Try resetting the logic functions on your tv by unplugging it for a minute, then plugging it back in.
3) Try covering up the infra-red receptor on the front of your TV to see if you're getting unwanted signals from the receptor. taping a piece of foil over that area is perfect. If it doesn't stop after doing these two things you'll probably need to take it to a shop.
4) If this does stop it, then look for unexpected signal sources. Have you added a remote control extender? Added a new device to your audio-video system? Changed to a new remote?

I hope this helps. Joe

I have exactly the same problem with a Magnavox LCD 42", very similar model 42MF437B/37. I don't have a solution. If you unplug the TV and plug it back it starts working, sometimes for hours, sometimes for less than 5 minutes, before it turns off again. Does anyone have any real solution?

I had a similar problem with my Phillips 42 in. LCD HD TV.

Here's the problem. The Power Supply Board. I opened my TV up(warranty was up of course) and found several bad capacitors. Phillips and several other companies were sold capacitors that although were highly rated failed within 5 years because of a lack of preservatives. All sorts of electronic equipment is now being effected due to these defective capacitors.
Solutions?
1. Take it in and have it fixed
2. Open it up, check the board for faulty capacitors(bulged or leaking) Buy a new Power supply board and install it.
3. Remove PSB, remove faulty capacitors and replace with compatible new ones.

Hope this helps

are you a technician if so go to the relay circuit and fix that circuit more than likely has bad ic like the eprom .
are leaky transistor also check the power button for lose connection they are tiny little switches now a day

I had a similar problem with my Phillips 42 in. LCD HD TV.

Here's the problem. The Power Supply Board. I opened my TV up(warranty was up of course) and found several bad capacitors. Phillips and several other companies were sold capacitors that although were highly rated failed within 5 years because of a lack of preservatives. All sorts of electronic equipment is now being effected due to these defective capacitors.
Solutions?
1. Take it in and have it fixed
2. Open it up, check the board for faulty capacitors(bulged or leaking) Buy a new Power supply board and install it.
3. Remove PSB, remove faulty capacitors and replace with compatible new ones.

Hope this helps