Panasonic LCD tv goes into standby and won;t display a picture

[dick_barton]

Re: Panasonic LCD tv goes into standby and won;t display a picture

Thanks for the help but I am not sure I need to test further. The link from reecyburger shows exactly the same symptoms in another tv from the same series. Also, mine blinks once red followed by a pause. One blink means backlight issue according to Panasonic. I need to decide whether to strip down the panel or not. I am wary of doing that , as I may damage the lcd beyond repair by dismantling everything. It may be worth doing though.

Take your time stripping it down. There's lots of Youtube video's on how to. Also do not mix up the order of the diffuser sheets when you lift them out from behind the LCD panel so that they go back in the correct order. A few people have made this mistake.

[Acerman]

Re: Panasonic LCD tv goes into standby and won;t display a picture

To check the backlights then disconnect the mainboard from the power supply and connect PS_ON (Power On) to Standby Voltage using a 1K resistor, and also BL_On(backlight on) again to Standby Voltage using 1K resistor.

Dick Barton , I understand what you are saying here. You mean use the 1k resistor with a multimeter to test the individual led's? I understand that you have to reduce the voltage by using a resistor so as not to blow the led's.

I now have some 1k resistors and I have decided to strip the panel down so that I can get to the led strips and then I will test each led with a multimeter and a 1k resistor.
Many thanks. I can see where you are coming from.
I will update once the panel is stripped down. Not much time this week, so there may be a delay.