Panasonic TX55DX600b Continuous red lights 3 seconds apart

[Fixing222]

It originally starts with green flashing light then it has backlight maybe lower region just but it's less than second then continuous red flashing light 3/4 seconds apart it lasts as long as I leave the set on.

[nomoresonys]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

With tv unplugged from power, unhook cable from powerboard to mainboard, plug tv into power, see if backlight comes on and stays on.

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

With tv unplugged from power, unhook cable from powerboard to mainboard, plug tv into power, see if backlight comes on and stays on.

It is the same when I unlpug mainboard connector from powerboard

[R_J]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

Check the voltage going to the two led strings on the power supply, test points SRV-led1 & SRV-led2, monitor the point and turn on the tv and note the voltage.
How many wires are on each plug going to the leds? You may need to test the voltage on each wire going to the backlights to get a better idea of the problem.
Post pictures of the board and the plug going to the led's

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

Check the voltage going to the two led strings on the power supply, test points SRV-led1 & SRV-led2, monitor the point and turn on the tv and note the voltage.
How many wires are on each plug going to the leds? You may need to test the voltage on each wire going to the backlights to get a better idea of the problem.
Post pictures of the board and the plug going to the led's

Quite a few I think 1 or two on each report 1.000v the rest below 1.000v between 0.700 0.012
Also I hear a clicking coming from approximately the area circled hard to tell exactly.

Also whether I press power on or off it dosn't change Noether does the clicking

[budm]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

It looks like you have 8 strings of LED, 4 strings per LED drivers, there are two LED drivers.
The SRV_LED 1 and 2 are for feeding the Voltages to the Anodes of the LED strings.
With black probe on chassis and red probe on The SRV_LED 1, what do you see on the meter when you turn on the TV? Same for SRV_LED 2.

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

It looks like you have 8 strings of LED, 4 strings per LED drivers, there are two LED drivers.
The SRV_LED 1 and 2 are for feeding the Voltages to the Anodes of the LED strings.
With black probe on chassis and red probe on The SRV_LED 1, what do you see on the meter when you turn on the TV? Same for SRV_LED 2.

In the brief time while turning the TV on while the green lights flash, I get 66v on some and 31 on other wires on each side both led connectors from the powerboard but in the few seconds during powering up it changes and falls back to low or near 0

[budm]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

I am asking for the Voltage reading when the TV is turned on at the jumper/test pint SRV_LED 1 and SRV_LED 2, only two test points I am asking for.

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

I am asking for the Voltage reading when the TV is turned on at the jumper/test pint SRV_LED 1 and SRV_LED 2, only two test points I am asking for.

I was wondering if the backlights so then I remembered I ordered a backlight tester aha thought it would be handy all came back at 33v give or take but the one set of negative and positive wouldn't light up on one of the two cables.

How do I know if it's just one strip is that usually the case when only one returned no lights and I bet there are no replacement ones now also
Edit seen replacement strips.

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

I am asking for the Voltage reading when the TV is turned on at the jumper/test pint SRV_LED 1 and SRV_LED 2, only two test points I am asking for.

Also sorry just realised what you meant it's 66 v from led1 and and led2 with led connectors unplugged that's in the short time the TV's initial power button is pressed after that 2-3 seconds it's back to between 0 and 1v with the led connectors unplugged still.

Is it likely one strip of bad LED's causing this may I have to replace more than one strip and is it likely to work in the case of I replace the led strip?

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

Ok to update I took of the panel as I had to anyway and did tests in the strips and found one did not light so I have ordered a replacement.

Does anyone know of it sometimes a led going can damaged a power supply or is that rare?

[budm]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

They just drive the LED's very hard so they do not last, make sure to turn down the backlights level for all inputs to as low as possible to extend the life of the LED's.

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

They just drive the LED's very hard so they do not last, make sure to turn down the backlights level for all inputs to as low as possible to extend the life of the LED's.

Thank you yeah i only put it on high to impress or when selling to make it look extra.
But regularly i always put on low for my eye health and avoid headaches and recently i learned it helps the TV too so will do thanks.

[Fixing222]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

They just drive the LED's very hard so they do not last, make sure to turn down the backlights level for all inputs to as low as possible to extend the life of the LED's.

Finally came it was the fix thankfully and low backlight looks good on this TV.

[budm]

Re: Panasonic TX55DX600b Continuous red lights 3 seconds apart

Thanks for the follow-up on the repair.