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Original post by: Abrsvc ,


I would be looking at a problem with the power supply.  There are a few voltages required for proper operation:  1) Main power (likely to be 12V) to start the majority of the TV and 2) 5V which will cover the logic portion of the boards.  There are fail-safes built in that will shutdown the TV if the voltages drop too far.  Also, once the 5V line drops too far, the CPU can get confused and all bets are off...

If you are not comfortable with opening up the set, have a service individual provide you with an estimate.  You may find that changing a few parts on the power supply board will fix the problem.