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Insignia NS-LCD42HD-09 turning on and off by itself

Troubleshooting TVs and Video Sources - Badcaps Forums - www.badcaps.net
I have had this set for several years and had really no problems til now. Let me explain what it is doing. When first powered on, the set will work fine for about 1.5 - 2 hours. After that at it's own will, it turns off, waits awhile, then back on by itself. There is no set time interval I have been able to track accurately. Once it fails, it will at random come back on, and anywhere from 30 seconds to 30 minutes later will shut off again. If the set is turned off, as for the evening, it will turn itself on in the middle of the night, at random.

In my first attempt to fix the set, and after reading posts elsewhere, I replaced the power control board with a "new" one from an Amazon.com supplier. It did not correct the on and off power cycling I'm experiencing. So now I'm lost.

I would appreciate any help in getting me going in the right direction to fix this problem. Thank you in advance.
Date: Sep 1, 2013   


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