Jojolaguitare
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Hello.
This failure is often found in the standby system. So, check the power supply as MPMP points out. It’s an opto-isolator circuit that starts the TV's motherboard.
Doing it yourself is too risky since there is 325 volts on the main power supply.
So, same opinion as MPMP >>> certified TV technician or professional.
See you later
PS: Hi MP! . . . This heat is tough.
-- "Patience leads to success, haste leads to nothing."
