TV is Philips 40PFT4101/12, power supply 715G6934-P01-000-002M, motherboard 715G6947-M002-000-004Y (703TQGPL068).
The problem is that when it is plugged in, the TV turns on by itself, the Philips sign appears, the backlight turns on and off a couple of times, and the TV turns off, and so it repeats itself in a circle. It does not respond to the remote and nothing is written on the screen, the red light does not blink.
A few weeks ago, it used to turn on by itself about once a week, but after that it worked, now it doesn't work.
I checked the power supply, voltages are fine, no swollen capacitors.
I disconnected the T-CON cable and the same thing happens.
The only thing I noticed is that the double diode D9121 heats up a lot together with the cooler.
Does anyone have an idea what this is about and what to do?
The problem is that when it is plugged in, the TV turns on by itself, the Philips sign appears, the backlight turns on and off a couple of times, and the TV turns off, and so it repeats itself in a circle. It does not respond to the remote and nothing is written on the screen, the red light does not blink.
A few weeks ago, it used to turn on by itself about once a week, but after that it worked, now it doesn't work.
I checked the power supply, voltages are fine, no swollen capacitors.
I disconnected the T-CON cable and the same thing happens.
The only thing I noticed is that the double diode D9121 heats up a lot together with the cooler.
Does anyone have an idea what this is about and what to do?
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