DuB-EnG: BLINKING RED FLASHING LIGHT FAULT ON PANASONIC LED TV - Repair / Trying to Fix / Refurbish

[@Mymatevince]

Enjoyable video Howard. Shame about the difficulty in disassemble but great to see the actual fault and very useful to others with the same TV failure 👍🍻

[@DubiousEngineering]

How do you find time to watch my crap dear Vince! .... it must be time for a meet up in the near future! I could bring battery powered radio equipment to a campsite near you ,:-)

[@DubiousEngineering]

And more importantly.... beer 🍺

[@Mymatevince]

@@DubiousEngineering Always find time Howard. Well I keep meaning to visit a close friend in Bristol, thinking late August maybe, so I will detour en route if you happen to be free. Let's speak nearer the date 👍🍻

[@stephencrockford3218]

Yes, thanks for the video. I have a Panasonic with the same fault symptom. Although the screen starts to light up and the green light comes on momentarily, then the red light flicks on and off ..

[@DubiousEngineering]

Almost definitely a back light led problem

[@theaustralianconundrum]

8:50 LED strips never fail in pairs like you see there. However the connections to the strips do! 9:26 It's not a conspiracy. It's FACT! Open any newer TV up and all you see is folded ribbon cabled taped down to just the right tension so that over time and many cycles, some of the cables in the ribbon structure can and DO change their resistance and the end result is what you see here. Naughty Panasonic, however they all do this now otherwise any of these LED smart TV's would easily last 30 years and we can't have that now can we????????

[@DubiousEngineering]

Does my head in that they fit parts that help planned failure after time. Angry!

[@theaustralianconundrum]

@@DubiousEngineering If we were these guys who need to shift perfectly good 4K UHD TV's? There is your answer. No sales! And not many people pull apart their giant Smart TV when said person has "some" electronics knowledge eh mate? But we know better. Have a great week sir!!!!!!!!

[@JackBealeGuitar]

Gutting that it failed over leds that are so cheap. Good luck with the future repair

[@DubiousEngineering]

Thanks Jack, keeping fingers crossed. Wife can't wait for old TV to be removed from lounge!

[@MrChristiangraham]

Now the pressure's off, definitely have a go at fixing the Panasonic.

[@DubiousEngineering]

Just ordered the LED strips :-) 😀

[@zalatnaisoma]

Thanks for this video. I have the exact same tv which had the same issue. 1 backlight led was blown. Changed it and tv works perfectly now. Thanks to you I did not have to poke around and diagnose it. Went straight to the peoblem:D

[@DubiousEngineering]

Yay!!! A video that helped someone!!! Brilliant news!!!

[@frigbychilwether]

Hi, if your new LED strips don't fix it, you could turn the tv into a big sort of panel light - DIY perks has a video about making lights out of tvs - very easy just get some cheap adhesive led strips, but them in and then all the diffusers and fresenel lenses layers make is a big soft light. I've done it with a couple of broken tv's I found on the street and it works well.

[@DubiousEngineering]

Ah yes! ... a window light! ... I've had a go at this with an old monitor... its quite cool! ... lovely to hear from you again! Best, H

[@Everythings_Adjustable]

I was going to comment about DIY Perks but you beat me to it Frigby 🛠👍😊

[@timballam3675]

Fixed a 54" LG 4K UHD TV 0n my 600mm deep workbench (that you've seen) that's now on the Workshop wall!

[@DubiousEngineering]

That's really good 👍 well done Tim! 👏... hope all is well with you and the family

[@rock.doctor]

I did the same as you. Found a set of LEDs that were not working, got a new set off Ebay from china and it still didn't work. The boards were ok. They over drive the LEDs to give the tv a nice vivid picture, if you turn the brightness down a little right out of the box, the set will last much longer.

[@DubiousEngineering]

Oh balls... I ordered leds yesterday... oh well, fingers crossed 🤞

[@theaustralianconundrum]

1:35 Note the FOLDED ribbon cable under the black tape? That is an engineering no no. Ribbon cables must always be absolutely flat and even for the entire run. Remove the tape and gently unfold the ribbon cable and then let it flap around in the breeze inside the TV cavity. There is no need to do what Panasonic have done here. LOL. To allow the main cable to be folded like that from the computer to the driver is absolutely asking for trouble. Cheers.

[@DubiousEngineering]

Totally agree!!

[@theaustralianconundrum]

@@DubiousEngineering I'd LOVE to see you start a "make your 4K smart TV last 30 years channel!" LOL!!!!!!!!!!! Because they certainly almost surely will if these filthy tactics were not adopted. Oh well mate. Such is life.

[@gixerags750]

Great video.. Spewing after buying those 3 replacement boards, least you have 6 boards you can sell now... I have my brothers PANASONIC 42" LED TH-42AS700A, which powering on gradually became problematic untill if finally wouldn't power on , ( was no more than 2 years old ) but resulted in a fast Green LED blink code ( aparently power board failure code) , which is next to the stand by light ..anyways I immediately thought of Electrolytic capacitor damage but noticed they were all Rubycon which are generally the best.. Any other ideas appreciated. Cheers

[@DubiousEngineering]

My problem was LEDs... Actually, just one led ... Nightmare to get to....

[@leeg4116]

"Things you've gotta do to get a new TV" we've all been there. Lol. Plus side, you can sell the boards on eBay to recoup some of the cost

[@DubiousEngineering]

Yeah.... or... I may just buy some LEDs and try again

[@leeg4116]

@@DubiousEngineering you don't know till you try dude, I think you should go for it

[@DamajaCJ]

What's the model number for this one, do you know? TX- then size (55?) then CX xxx something?

[@DubiousEngineering]

TX55DX600B

[@MR-HOONIGAN]

What did you do with the old TV.. Could come in handy for me that has the know how and patience

[@DubiousEngineering]

I've put the pcbs and wiring looms up on ebay ... I also have a few strips of leds

[@theaustralianconundrum]

@@DubiousEngineering LG 4K UHD's suffer a very convenient "out of warranty" manufacturing issue. The symptom is "Could not establish an internet connection, retry". And it is not a software issue as so many thousands of owners think. The Bluetooth and the WiFi transmitter are connected by very fine "ribbon" cables that LG decided to FOLD at 90 degree angles! Works fine for a few years then gradually more and more loss of WiFi error codes. Solution? I pulled the back off our 65" and simply "unfolded" the ribbon cables and the extreme tie downs and simply removed the tension and made them all nice and dead flat again. Re-assembled and has worked like a charm for over two years now. The secret is that LG "cover" the folded sections of ribbon with a black tape so you can't see the kinks. If you don't look closely it would be easy to miss. Grrrrrrr @ LG! Cheers!

[@karen4you]

You ought to remake that TV into a 'fixable' model that hinges open like a car trunk, uh boot? It might be the longest-lasting appliance if you could make it easy to replace parts. Companies do not want things to last for a long time now, want to sell more and more. Gone are the days of repairable appliances, buy one for the rest of your life. Now it is replace with the 'latest version'. UGH. Ah, but you tried, and a new work area for a bit of a change. Could you make a table out of it or something? Or can you test your new saw and cut it into easy-to-remove bits that fit into the recycling bins? I'm a year older today. No party, just some ice cream and moonshine beverage later.

[@DubiousEngineering]

OOoh... Happy Birthday Karen! I'd love some of that moonshine!! Does it come in a glass jar!?!? Anyway... I did get it fixed by replacing the LEDs, but then sadly broke it again after trying to re-assemble. So... out came the chop saw - I made it real small and put it in the bin!! :-)

[@SonofMercy888]

Is the tv not too high over there 🤔?

[@DubiousEngineering]

Maybe that's why I have a bad back!! :-)

[@manuelagyemfra9121]

How much is the LEDs

[@DubiousEngineering]

People sell them on ebay ... I have some spare of youbare in the UK

[@Everythings_Adjustable]

You have a lot more patience than me Mate! 🥃 👍 😊

[@DubiousEngineering]

I actually fixed it in the end by replacing the leds... but then broke it trying to reassemble

[@pathfindero2072]

Hello, I have the same problem with TX-40AS640,PSU have 15.5V and 21V instead of 16 and 24, because signal TV_SUB_ON from digital board is missing. I apply it from 5.3V, PSU working well but TV don't start. I saw PNL_12V rail is down, I apply Enable signal for 12V PSU. rail is OK,, it supplies the T-CON, which looks ok, TV don't start... 😂. So. yeah... The LED strips must be the problem

[@DubiousEngineering]

Yup... pin in the arse getting to those leds !

[@namAlexander]

buying all them parts and still same issue , heart sinking too say the least, bet the leds are custom so costly

[@DubiousEngineering]

Blooming broke my heart mate... itnwas a great TV up till that point

[@tpraba15]

Had similar problems twice with my Panasonic TV. After all tries finally Panasonic service man had to come and change the switch board. Loosing trusting in Panasonic tv

[@DubiousEngineering]

Yeah it’s distressing…. They don’t seem to last…

[@k.w9249]

I reseated all connectors and the tv worked again, but that was short lived...TV worked for 30 mins approximately...now TV won't turn on at all now 😂

[@DubiousEngineering]

Cut your wife's hair and buy a new TV 😀

[@stephenhookings1985]

Often if you take power lead out, then press the physical ON button for 10 seconds this can help reset. I have the blinking red LEDs - 7. Apparently this is the 3.3v line not keeping to required voltage then the PS gets shut off. It is sometimes instant then won't switch on (until I do above). I saw one dude trace back to a fault cap on the LED mosfet. In out case the Mrs put some water out for the cats ... they knocked it over back of TV and it poured out. Glad to see what has to be done to get inside the LED array. Looks like I will be ordering a new TV ... and new cats. I think I will try to see if disconnecting the LED board allows the power to stay on - if so then likely like you it is problem with the array and well then it isn't worth parts canoning the thing. The 32" LCD Samsung has been promoted back to main TV. That has lasted almost 3 x as long as the Wanasonic. Maybe the Mrs will get that Bravia she kept on about. Thanks for posting. And good haircutting skills.

[@groundbreakerexplore]

Thank Bro

[@DubiousEngineering]

Pleasure 🙏 good luck!

[@jeffnpatricia]

My nest step is to fit it into my weekly rubbish disposal box. 😉

[@DubiousEngineering]

Yup! I used a chop saw!

[@donpixote3321]

The correct way to test the power supply is out the output. That will pinpoint the problem without wasting money on guesswork. Nice try tho we all get to learn the hard way sometimes.

[@DubiousEngineering]

Yeah... And the root cause was an LED in the backlight that had failed.... But I'd broken the LCD display accidentally by then. FFS

[@mr.miyagi3452]

Still working ?😂

[@DubiousEngineering]

Working hard 💪 😀

[@hTyKn1]

Panasonic stuff is not as good as it used to be as the lower end stuff is made in Turkey and just badged as Panasonic

[@DubiousEngineering]

Yeah, they used to make some really good kit.. tape decks etc...

[@LP-yd4ww]

Dement!!!!

[@DubiousEngineering]

Ha! 😀

[@imnickleonard]

I need a new tv. Ill get my scissors

[@DubiousEngineering]

Teehee! ... I'm from a family of hairdressers... wife's happy not to spend £80 on a trip to the hairdressers!

[@imnickleonard]

@@DubiousEngineering it’s a great trade, me being folically challenged has saved me some £ though

[@DADEMANA]

cheater

[@DubiousEngineering]

No further questions your honour !