This is our display TV in the lobby at work, has ~14,500 POH. Couple days ago it made a loud monotone static sound, and the picture froze. The receptionist said the power button wouldn't turn it off. Once unplugged, it would not turn back on. The front LED blinks, and when you hit the power button, it does make that beep sound that Samsung TV's normally make.
I unplugged the Tcon board, and it does the same thing.
The NTCs look like they run hot. They both read 3.2Ω when cold, in circuit
Pulled and checked all electrolytic caps, all tested good. Getting 383V DC over both input caps. 5.3V standby reads 5.09V.
Power on/off reads 4.32V
13V reads 12.89V on PSU and on mainboard
Any ideas?
I unplugged the Tcon board, and it does the same thing.
The NTCs look like they run hot. They both read 3.2Ω when cold, in circuit
Pulled and checked all electrolytic caps, all tested good. Getting 383V DC over both input caps. 5.3V standby reads 5.09V.
Power on/off reads 4.32V
13V reads 12.89V on PSU and on mainboard
Any ideas?
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