Samsung LE40A85651M vertical lines issue

[donst]

* Can a mod delete my other thread. After reading the rules i tried adding the model number to title but it would not edit.

-------------

Hi guys, have a Samsung LE40A85651M that has an issue with vertical lines. The problem is the following:

When i turn the TV on it displays vertical coloured lines that completely cover the screen. After a while (times vary) these lines vanish and are replaced with either:

• The picture then being displayed with faint lines
• Half the picture being displayed with the other half covered with the vertical lines that cover the screen

Example below:





Video of entire startup process:

http://180upload.com/gt6m6u2w7y63

I've checked for blown caps and there doesn't seem to be any. Anyone have any ideas on how to fix this? All help would be much appreciated.

Thank you.

[Shinju]

Re: Samsung LE40A85651M vertical lines issue

Photos of the insides of your panel of each board as clear as you can, this looks like a gamma chip failure as well as a possible tab bond/panel failure.

Do a power off, mute 1,8,2 power on to access the service menu and find the test patterns and run them and see if the lines persist.

(when in the service menu DO NOT CHANGE ANYTHING) with out writing the original setting down first, Test patterns are excluded but any other settings once changed are permanent until you change them again.

[Dang]

Re: Samsung LE40A85651M vertical lines issue

What happens when you turn down the contrast?

[tom66]

Re: Samsung LE40A85651M vertical lines issue

I have a similar set (LE40A656) pic is OK with contrast down (just muted image) with contrast up starts looking like this

[donst]

Re: Samsung LE40A85651M vertical lines issue

Photos of the insides of your panel of each board as clear as you can, this looks like a gamma chip failure as well as a possible tab bond/panel failure.

Do a power off, mute 1,8,2 power on to access the service menu and find the test patterns and run them and see if the lines persist.

(when in the service menu DO NOT CHANGE ANYTHING) with out writing the original setting down first, Test patterns are excluded but any other settings once changed are permanent until you change them again.

Hi, thanks for the reply.

Can't seem to gain access to the service menu. I've tried various methods (speed and timing wise) but still unable to get into the service mode.

Please find images attached below. I've taken a few in order to get the clearest pics possible for you.


Tom, Dang, i've turned the contrast down lower and the lines do indeed disappear. That said turning down the contrast does not remove the faint lines completely, when i access the menu or change channels the lines reappear on the graphics that pop up, then disappear again when the graphic does also. Also, on startup the amount of thick lines (pic 1) vary and sometimes they cover half the screen, sometimes just a third and so on, turning the contrast lower does not seem get rid of these lines.

[donst]

Re: Samsung LE40A85651M vertical lines issue

Anyone?

[senndogg]

Re: Samsung LE40A85651M vertical lines issue

For me (based on my experience with 3-4 LE4xA65x Tvs):
90% failing display
5% faulty tcon
5% other.
This is the notorious-shiny-full-hd-samsung display, isnt it?

[donst]

Re: Samsung LE40A85651M vertical lines issue

Thanks for the reply.

How would i go about troubleshooting this issue and finding out what exactly the problem in the set is? I know you've stated that there is a huge probability that it is a failing display problem but how can i narrow it down to be absolutely certain that it is? Other than purchasing replacement panels.

[senndogg]

Re: Samsung LE40A85651M vertical lines issue

Try connecting only 3 or 2 of the ribbons. You may get controversial results but thats more for statistics.