Just bought a Samsung LCD tv, 32" 2 days ago and it worked fine yesterday but today it keeps turning on and off by itself but even when it turns on, no picture comes up. Tried resetting it (unplugging and disconnecting cables, etc). Nothing seems to be working. The bleeping it makes when turning on and off is driving us mad. I have the same problem with an LN46a850. Audio, etc. seems unaffected, but the screen will blank out after a period of time. When it blanks out, it seems there is some back light still on. It is like there is no input, not powered down. You can change the channel or go to another input and hear the audio. Sometimes the picture will reappear on its own. Often not. Then you have to power down. Then power up again and the picture is back fine until the next episode. Just bought the set on Amazon Warehouse deals, listed as minor blemish on housing. It seems the real undisclosed problem is a faulty main board.
Since you have another TV with the same problem you can try using an antenna(indoor model ok) to see if the cable is causing the problem. If not return TV before the warranty expires.
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