TV continues to power on and off, no display.
I have a 2010 Sanyo DP50749 with an IC5750 chassis. When I switch the device on the power stays on for around 20 seconds, then it shuts off for 3 seconds before automatically powering on again; the cycle keeps repeating until I manually turn the tv off. I'm new to TV repair and have no idea where to start. I'd like to save the TV instead of throwing it away. How do I test to see what's wrong and/or fix the problem?
Update: Disconnected the power going to the right and left screen power controls. TV power cycle interval was shortened to around 5 seconds. Tested all (ceramic) fuses on the main power board and all came up zero with a diode test. I'm thinking there's a problem with the power board.
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