Forum > LCD TV forum
Panasonic TH-L50B6D LED 1 Blink Code
downunder:
Re your attached image, yes, that is exactly right. That will hopefully stop the SOS signal from reaching the microprocessor and affecting the backlights
operation. So in your case, did the backlights continue flickering?
RE THE badcaps post, it only refers to backlighting that uses CCFLs (cold cathode fluoro lamps), a different technology that uses long thin fluoro lights in lieu of LED strips. So not applicable in your case.
Hate to say it, but your problem is looking more and more like faulty LED or LEDs inside the panel. Bruce
BookWormStud:
--- Quote from: downunder on August 24, 2017,16:42:30 ---
Re your attached image, yes, that is exactly right. That will hopefully stop the SOS signal from reaching the microprocessor and affecting the backlights
operation. So in your case, did the backlights continue flickering?
RE THE badcaps post, it only refers to backlighting that uses CCFLs (cold cathode fluoro lamps), a different technology that uses long thin fluoro lights in lieu of LED strips. So not applicable in your case.
Hate to say it, but your problem is looking more and more like faulty LED or LEDs inside the panel. Bruce
--- End quote ---
:73: Tried again nothing happened.
downunder:
Well, I think its time for examining the LEDs and wiring inside the panel. Bruce
BookWormStud:
--- Quote from: downunder on August 26, 2017,03:07:08 ---
Well, I think its time for examining the LEDs and wiring inside the panel. Bruce
--- End quote ---
Hey can I check various Test Points on backside of LD-Board. I mean I cannot check them while it is mounted on back of TV. If I unscrew it and put it on table with everything connected can I measure the voltages at Test Points(labelled as TP#### see the Image). Would it cause any damage because Ground screws are removed frm the board.
If I can, then where should I put the black probe of multimeter on metal chasis or somewhere else.
Also another question if the LED(Backlight) is disconnected from the LD-Board then why do the voltages at LD3 keep flickering in same pattern with Backlights.
downunder:
Yes, you can check the LD board thus. It will still have ground connections through LD1 back to the power board. Use metal chassis as your ground for measurements.
You make a valid point about unplugging LD3 and the voltages still fluctuate. Can only assume that the LED sensing on the LD board sees there is no LED current and sends the SOS back to the main board.
Have you tried the self-check mode as per service manual. This also acts as a factory reset when you exit the mode. Not sure if it'll achieve anything in your case, but it's worth a shot. Bruce
Navigation
[0] Message Index
[*] Previous page
Go to full version