The set if it has a DM unit when unplugged should blink for 70 seconds and allow you to turn on.
If it does not, if when you try to turn on green light comes on and goes off---do the self check:
Press and hold both the menu and input buttons for 5 seconds and release both; power light should blink a two digit error code at least 5 times. 2 blinks, pause and 2 blinks is the most common.
If the set has a reset button on the front it has a DM unit---built in receiver--even if it fails the green power light will blink nonstop.
Again, if you try to turn on and green power light comes on and then goes off---do the self check and let me know what you find.
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REGARDS, SD TECH
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