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Some things come to mind:
I have seem some 5" CRT TV with strange sympton, and resulted to be only the ON/OFF switch, with intermitent good/bad and resistive contact.
Maybe a bad cap near to sweep dedicated IC, or bad solder?
Or, the IC...
In any case, track down the 12V input and check the switch; they can love to have bad habits
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So many projects, so little time...
Last edited by Alex KL-1; 10-03-2023 at 09:25 AM.
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