Have TV Questions? Ask a TV Technician
Hi and thank you for using justanswer.I`m going to help you with your tv but first i will have a few questions;
While there is no picture,do you have sound ?
I will wait for a while to see if you become available for chat, just send me a reply and i should be with you within a couple of minutes.
yes. no picture from dvd either
yes it has sound. no picture from dvd either
There is one circuit board in your model that is frequently the cause for that problem.
That is the Zsustain board.
Do you wish to look into this yourself ?
o.k then what i can do is upload a picture of that board so you can identify it once the back cover is removed.
Be right back
ok then what. New board?
Yes a new board, that board when defective is not repairable.
Last time i looked, it cost less than $100
where does a person purchase a board?
I have here an address and it also has a picture of it if you want to take a look, just click the link below;http://www.rivervalleyelectronics.net/LG_6871QZH056B_ZSUS_Z_Sustain_Plasma_TV_Board_p/6871qzh056b.htm
That board sits on the right hand side(from the back) of the tv set.
Just screws and plugs, no solder to replace it.
ok thanks i will check it out. anything else?
Not at this time but in any case you will receive an email after this chat is closed and there will be a link to get back to me anytime if you have any questions.
thanks again. hope it works
I can say that i am 99% sure it will work , it is a common problem for this model.Now you can close this chat from your end with the accept button if you are satisfied with my answer and have no other questions at this time.
received board. tv STILL does not work no sound or picture
I would make sure all the plugs and connectors are sitting in securely and also verify around that some of the other circuits didn`t get unplugged.
Even if that circuit was bad you would still have sound like you had when we first talked.
Or even if that circuit was pulled right off the tv you`d still have sound.
So please make sure nothing has been forgotten while doing the repair, it does happen easily.
Well, i have to tell you taht my diagnostic was based on the fact that you had sound and no picture, that is why it was the first question i asked and in your model it is a dead giveaway when there is sound without the picture.
Now we are probably talking about a different ball game if you would.So perhaps some more troubleshooting could be done and that board could be returned ?
When you come back and are ready, take a look at the picture below, it is your Ysustain board.You can see that i pointed 2 fuses, i`d like you to pull them out and check them for continuity or beep them if your meter has that function.
If one of them is blown let me know but DO NOT REPLACE THEM.
We`ll take it from there.
what if one is blown? Just got home and really tired. tv is back together would have to take back off again. Can you give me a senerio of steps to take? posibly tomorrow.
o.k no problem, it can wait until tomorrow.
The scenario of a blown fuse would indicate a bad Ysustain board.