Panasonic 55DX600u repair help - no display fast green then slow red led flash

[Diah]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

put yours DMM on V DC 200V Red probe each time on SRV-LED1 & SRV-LED2 with reference to TV chassis..then plug the Tv in wall socket... remark yours DMM reading high and low on each Jumper of SRV-LED1&2

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

put yours DMM on V DC 200V Red probe each time on SRV-LED1 & SRV-LED2 with reference to TV chassis..then plug the Tv in wall socket... remark yours DMM reading high and low on each Jumper of SRV-LED1&2

65v while attempting to start then settling at 1v after fault, 66v and 1v for the other.

[lotas]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

I think this is looking like the same problem that I have. https://www.youtube.com/watch?v=X1bFG2j-Uts

Well, as I wrote code error "1" - BL SOS.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Well, as I wrote code error "1" - BL SOS.

Yes this makes sense. I should have stopped counting at 1!

Thanks for your help :-)

[lotas]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Now the problem is to disassemble it, replace the LED strips, assemble it without damaging the matrix and its cables.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Now the problem is to disassemble it, replace the LED strips, assemble it without damaging the matrix and its cables.

Yes it looks like a big job. I'll have to think about whether I want to do it or pass it on to someone with more time.

[nomoresonys]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

You can do it just take your time and treat the panel with kid gloves.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Now the problem is to disassemble it, replace the LED strips, assemble it without damaging the matrix and its cables.

Looking at some Panasonic repair videos it looks like they had high resistance on the LED strip connectors - is this likely the problem here or are dead individual LEDS more common?

You can do it just take your time and treat the panel with kid gloves.

Thanks for the encouragement! A friend who is a highly skilled tech recently had a panel break doing this job so I'm a little hesitant! I might be ok though.

[Diah]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

windows glass double suck caps i used with 85 size with out any problem.. like kids game
so equipment's play the roll not the courage

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

windows glass double suck caps i used with 85 size with out any problem.. like kids game
so equipment's play the roll not the courage

Ok good tip. Do you suspect dead LEDs or bad side strip connectors?

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Ok so I got to the bottom of it. LED D3 on the top left led strip is dead. All the other strips seem ok.

[nomoresonys]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Ok, this quote from your initial post was the best clue, it's almost always the backlights when it happens "backlight gives a brief flash then set shuts down"

[nomoresonys]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Looks like the bl-sos 1 blink was right on the money this time.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Looks like the bl-sos 1 blink was right on the money this time.

Yes I feel a bit silly missing that!

Now I have to decide whether it's worth fixing or not. I can get a used BL strip at fairly low cost, but I have a feeling once they start failing the others may follow.

[lotas]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

It is better to change everything to new ones, otherwise there will be repetitions after some time.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

It is better to change everything to new ones, otherwise there will be repetitions after some time.

Sadly I don't have the funds to replace with new. I'd actually love to find a single diode to replace the dead one with as I'm comfortable with SMD. It appears to be a 3030 at around 5300k but I imagine it would be hard to match it accurately.

[nomoresonys]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Probably go to about any tv shop, they're likely to have some available for a buck or 2, try to get at least one strip, may need the extras soon, that's all used ones are worth, be sure to turn the backlights down as far as tolerable to prolong the leds lifespan.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Probably go to about any tv shop, they're likely to have some available for a buck or 2, try to get at least one strip, may need the extras soon, that's all used ones are worth, be sure to turn the backlights down as far as tolerable to prolong the leds lifespan.

I can order a used strip online for about $20USD delivered. I'm not sure I'll be able to find one locally though, we aren't close to any decent TV repairers. If I knew the color temp of the led I'd just order a few individual leds. I have had a go at working it out using a camera with manual color temp but I doubt it's accurate without a proper grey card.

[nomoresonys]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

.

[fixxy88]

Re: Panasonic 55DX600u repair help - no display fast green then slow red led flash

Ok, yeah sometimes I forget how big Australia is, must be nice to have all that room to stretch out in, getting pretty crowded Stateside.

Yeah it's great be able to drive 10mins and feel like you are all alone! We are lucky :-)