Panasonic 50" LED TV TX-L50B6B BLINKING

[pyromyst]

Woke up on xmas morning to find my 2 year old panasonic tv just blinking at me.
Whole screen blinks at one second intervals.
Please help.


Please see attached.

i am getting a steady 5.2 volts at the standby pin with all leads disconnected.
the centre pin on the main board to the Tcon board is fluctuating from 1.1v to 1.25v.

i get 107v fluctuating to 85v on the outlet from the LED driver board.

Ihave not yet removed any further panels to check LED's

Many thanks in advance

[zomi]

Re: Panasonic 50" LED TV TX-L50B6B BLINKING

You have one or more blown leds, its nearly always the leds on this particular set.
Done about 10, always been leds
Some just done come on
Some come on and no display
Some come on and flicker

[pyromyst]

Re: Panasonic 50" LED TV TX-L50B6B BLINKING

Many thanks Zomi.
After stripping the TV down i found 3 rows of LED's not flashing and 3 rows that were.

i swapped out 2 good ones for 2 bad ones and got those to flash too. but still only the centre 3 strips flickered.

After swapping the bad top strip (L1.R1) with the centre (L1.R1) the outer 3 flashed.

so it leads to one strip of (L1.R1)
will report back if fixed, many thanks for your help

[zomi]

Re: Panasonic 50" LED TV TX-L50B6B BLINKING

if you have a multimeter
then set on diode mode and test each led sep
you just have to scratch the paint a bit

https://www.youtube.com/watch?v=eEJoPCa7Kt0

then you can see whats what.

Some times they do go in a bad way and take out the inverter