LG 55 Inch OLED REPAIR/EXPERIENCES!

[Moreno83]

Hi , has anyone worked on a OLED TV already?

I almost bought a defective LG Oled (55ec930v ). The one on the pictures.
The tv came with the symptom that it had a white vertical stripe followed by the tv shutting down on its own and won't turn on anymore.

As interested and enthusiastic as i was to buy this tv i first googled to see how OLED exactly works which is similar to plasma. Short story is that when the panel is damaged the tv will never work again. Tv on the pictures is damaged , small scratch.
For example , when you throw something against a led/lcd tv...the backlight and picture still works in some area's. When you throw something at a plasma tv the gas thats inside will go away which is almost the same with OLED.

Just a small thread to warn enthusiastic hobbyist/repair people not to buy these OLED's when they are defective because 90% is all panel failure. New panel is to expensive.....

Im still interested in buying these OLED tv's but will it top my VT50 with just normal tv?

[attainteddragon]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

hanging to get my hands on an oled, but i think it is still a couple of years off for me.
they are only just starting to get sales going now and it will be a while before they start selling them in bulk i think.

[Moreno83]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

I had the chance to buy one for 100 euro. But it's useless when the screen is damaged.

[thoma]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

http://televisions.reviewed.com/feat...mage-retention

https://www.cnet.com/news/seven-prob...d-televisions/

[thoma]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

[tom66]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

I would have bought it just for curiosities' sake at 100 euros.

OLED panels do not contain gas. They are essentially identical to LCD panels, but instead of a backlight layer with LC glass which makes colour, they are a self-emitting layer of organic LED material.

In fact, the driver ICs are very similar to LCD panels. You have VCOM, VGH, VGL and AVDD, just like in an LCD. The TFT layer is very similar. The ICs on the panel itself don't drive the main current, that is handled by the TFT itself. So OLED should be about the same in terms of reliability as LCD goes. And a good OLED might even be more reliable than a plasma due to the lower power dissipation and lower voltages. And most importantly, OLED can do zero black, which LCD can't do, and plasma can only do on some prototypes.

A crack in the glass will be just as fatal as a crack in an LCD or plasma panel... it's user abuse, the TV will break, simple as.

[Moreno83]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

True but a damaged LCD will still show a picture , Plasma and/or OLED wont turn on at all.

[tom66]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

True but a damaged LCD will still show a picture , Plasma and/or OLED wont turn on at all.

Not necessarily true, some damaged OLEDs still display a picture. If the damage is very severe then it shorts the power supply via the panel which will cause a shut down.

[jjanssen7]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

I've repaired several with bad tcon board (or whatever that is called in a OLED as it does more than the usual tcon) and one with a bad main. Been lucky so far that none have had failed panels.

[dskall]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

Well without led's to overdrive and burnout. They may have to go back to capacitors to limit there lifespan.

[budm]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

So how hard are they driving those OLED to get enough brightness out of them? Sure like to see the spec. of the OLED panel.
https://www.oled-info.com/lifetime
https://www.oled-info.com/tags/lifetime/blue_color

[Moreno83]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

I've repaired several with bad tcon board (or whatever that is called in a OLED as it does more than the usual tcon) and one with a bad main. Been lucky so far that none have had failed panels.

What were the symptoms? You think the tv on these pictures is fixable or is it a bad panel.

[jjanssen7]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

Oddly enough two of the ones I repaired were the same model as yours. Symptom was no display, no lines, and a new Tconn fixed it both times. I had the same model cracked screen OLED and could use the tconn from that. There is some pretty serious heat sinking on the tconn so I'm guessing heat finished the old one off.

I don't have enough experience with OLED's to say much about yours, but it doesn't sound promising if it is deeply scratched and shows a white vertical stripe.

[Moreno83]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

Thansk for the reply! How did you know the t-con was bad? Maybe i will buy the tv and try to fix it.

[Moreno83]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

Oddly enough two of the ones I repaired were the same model as yours. Symptom was no display, no lines, and a new Tconn fixed it both times. I had the same model cracked screen OLED and could use the tconn from that. There is some pretty serious heat sinking on the tconn so I'm guessing heat finished the old one off.

I don't have enough experience with OLED's to say much about yours, but it doesn't sound promising if it is deeply scratched and shows a white vertical stripe.

The screen was cracked on yours , did it still give a image or what does the OLED do when the screen is cracked? Blinking led or something ?

[tom66]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

The screen was cracked on yours , did it still give a image or what does the OLED do when the screen is cracked? Blinking led or something ?

Anything from no display at all, to partial display, to shutting down after powering up with a distorted image.

[tom66]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

So how hard are they driving those OLED to get enough brightness out of them? Sure like to see the spec. of the OLED panel.
https://www.oled-info.com/lifetime
https://www.oled-info.com/tags/lifetime/blue_color

We'll have to see, but I wouldn't be surprised to see at least 20,000 hours. Not as good as plasma, but could still last 8-10 years of normal operation.

[jjanssen7]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

The screen was cracked on yours , did it still give a image or what does the OLED do when the screen is cracked? Blinking led or something ?

I can't quite recall what display the cracked one had, but I suspect same as Tom said. The tv I repaired had TERRIBLE burn in. Worst I've ever seen and I used to fix a lot of plasmas!

Something to keep in mind with that model...

[matyka]

Oddly enough two of the ones I repaired were the same model as yours. Symptom was no display, no lines, and a new Tconn fixed it both times. I had the same model cracked screen OLED and could use the tconn from that. There is some pretty serious heat sinking on the tconn so I'm guessing heat finished the old one off.

I don't have enough experience with OLED's to say much about yours, but it doesn't sound promising if it is deeply scratched and shows a white vertical stripe.

Hello everyone, I have a problem with my LG 55ec930v same symptoms, when pressed power button the stand by light comes on for 2 seconds and shut it down, no picture no flashing lights. I have measured the voltages on power supply all good for 2-3 seconds. I noticed the 24v which goes down to the tcon board reaching only around 10.5v before tv shut down. Any advice would be much appreciated.

[hsuwal]

Re: LG 55 Inch OLED REPAIR/EXPERIENCES!

Hi Mateka, Did you fix your TV or did you find what is actually issue with your TV. I'm looking at same model and same problem. I have replaced power supply and main board but same problem and nothing make difference. Thank you