LG 60pz750. After year and a half strange burn in flickering

[ElctroNYC]

Hello, I bought this TV in november of 2011. Few days ago I noticed a strange flickering burn in on the screen . I have one example in pictures and other in video. Please if anyone can help me with this issue. This is the link for the video

http://m.youtube.com/watch?feature=c...e_gdata_player

Thanks in advance

[Mrx3750]

Re: LG 60pz750. After year and a half strange burn in flickering

My first suspicion would be the backlight. However the pattern is kinda weird for that.

Getting the back off the TV and posting a good picture of the circuit boards might tell us more.

[capkid]

Re: LG 60pz750. After year and a half strange burn in flickering

This is a plasma - no back light. It could be a bad Y-Sustain, control board, or main board. You'll have to open it up to accurately diagnose the issue.

[tom66]

Re: LG 60pz750. After year and a half strange burn in flickering

To me, it looks like the Vs or Ve voltages are low causing insufficient gas discharge.

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

Another thing is that when I turn on the tv the image is fine but after few minutes it begins to do that weird thing. When i get the time ill put it down, that is a heavy beast

[tom66]

Re: LG 60pz750. After year and a half strange burn in flickering

When you do, take the cover off and give us some clear pictures to work with.

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

Hello everyone, thanks for your replies. Before i opened the TV i tried with LG's costumer service and luckily they gave me and extended warranty . This is the tv diagram.
First they replaced part 201 and the screen was the same, then they replaced part 207 and the tv got a little better and when they replaced part 208 the tv when back to its beautiful screen. Can someone explain me which components are they please?
201 PART NUMBER: EBR67818201
207 PART NUMBER: EBR71516301
208 PART NUMBER: EBR67820001

Thanks again for replying

[tom66]

Re: LG 60pz750. After year and a half strange burn in flickering

201: Control PCB
207: Y-sus PCB
208: Z-sus PCB

So it looks like it was low Ve, as Z-sus on these generates Ve (LG call it Vzb/Vzbias.)

How far out of the warranty were you?

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

The warranty expired november 2012. So i was out of warranty for 10 months. I was about to ask. Why it fail so quickly? Is it the brand not reliable enough?

[tom66]

Re: LG 60pz750. After year and a half strange burn in flickering

LG are more reliable than Samsung, and Panasonic are more reliable than LG.

However, I would actually consider putting LG ahead of Samsung and Panasonic now given the rash of failures of newer Panasonic plasmas, due to cost cutting. Newer LG plasmas fail very rarely, mainly because instead of the other two, LG rarely make significant changes to their designs year on year... they have found the optimal solution which is reliable and inexpensive to produce.

For them to honour a warranty expired by 10 months is great customer service.

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

LG are more reliable than Samsung, and Panasonic are more reliable than LG.

However, I would actually consider putting LG ahead of Samsung and Panasonic now given the rash of failures of newer Panasonic plasmas, due to cost cutting. Newer LG plasmas fail very rarely, mainly because instead of the other two, LG rarely make significant changes to their designs year on year... they have found the optimal solution which is reliable and inexpensive to produce.

For them to honour a warranty expired by 10 months is great customer service.

hello again,
after 2 years the TV went back to the same problem. I read your tread about how to solder again where the coils are in a plasma Tv. I did it the first time but after a week the tv went back to the same problem I guess because of the quality of the solder. Today, I try a different solder apha fry rosin core but i think I made a mistake. I took off the old soldering it had with a solder remover. I solder again and now I have not image but I have sound. Did I damage the cards?
thanks in advance

[ReeceyBurger123]

Re: LG 60pz750. After year and a half strange burn in flickering

Is the solder parts connected to the trace still ?

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

Is the solder parts connected to the trace still ?

I believe so. there were some solder left on the joints and I put the new solder on top of it.

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

Should i use more solder to cover some of the trace?

[ReeceyBurger123]

Re: LG 60pz750. After year and a half strange burn in flickering

Hmm, are all other cables plug in correctly ?

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

yeah and you know what happen to the card at the left side 201 PART NUMBER: EBR67818201 I put solder without taking the old solder out and it gave a inky image if i disconnect the card from the right I think is the 08 PART NUMBER: EBR67820001. then I took off the card from the left again 201 PART NUMBER: EBR67818201, i took the old solder out and put new one and now it gives me just sound.

[ReeceyBurger123]

Re: LG 60pz750. After year and a half strange burn in flickering

Ok do you have a DMM you could start to check some voltages ?

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

yeap I have one. which part should check for voltage?

[sordids999]

Re: LG 60pz750. After year and a half strange burn in flickering

Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem

[ElctroNYC]

Re: LG 60pz750. After year and a half strange burn in flickering

These are the pictures



The first one is the 201 PART NUMBER: EBR67818201 and the second one is
208 PART NUMBER: EBR67820001 . I think.