I have this problem, suddenly. Following the instructions at
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seems to have no effect, although I am unsure EXACTLY what the procedure given there actually is, in detail. For instance, it is not clear whether the SC on PL701 is supposed to be applied when the power is on and the set in standby (because you cannot switch the set on with the H/S if the set is off), and what does Chan down 3 times mean, and what is the TV button (TV/AV?) ? Also, the word Tatung appears nowhere in or on the set.Thanks in advance.