My samsung lcd tv is 18 months old and has now developed shadow lines on the screen. Its more noticibale when things klike football and snooker are on as the screen is mostly the same colour is there anything to fix this if not can I go back to samsung for a replacement even though its more than 12 months old

You did not mention the model number, by our experience, the problem is a defective T-CON board.

one of your driver module is defective try to consult the service center.

When you have video display problems such as shadows and lines that go away after warming up, or come and go during viewing, it is usually the LVDS cable and T CONN board going bad. The screen can have one of the following or combinations of blurs, different layers of brightness and lines. It could be the backlight but most of the problems with the LNT4661F have been this.

I had the shadow and line problem and replaced both the cable and board for $120 and that fixed my problem. The TV was only 18 months old. Since I had the TV apart, I went ahead and replaced the capacitors on the power supply board so I wouldn’t run into the clicking problem that also affects this model TV. You can find the parts numbers for the LNT4661F cable and board below. You can find links to YouTube ( Part 1 & 2) to show how to replace the capacitors. Good luck.

Samsung A/S-T CON BOARD BN81-01312A

Samsung Lead Connector LVDS BN39-00883A

YouTube (Part 1) http://www.youtube.com/watch?v=Mm51C_RDIZE

YouTube (Part 2) http://www.youtube.com/watch?v=BNHHrgX_6cs

What connector do you use for the sky box? Try replacing the cable, that can cause some blurring and other artifacts on the image.

The problem is that the panel has failed. Apparently this is a common problem with LCD TV's between 18 mths and 3 yrs old. If it survives over 3 yrs it is likely to last for a few years longer. The cost of replacing the panel is more than a replacement TV!

Well the shadow is caused by the pixels going dead. There is a term for this "dead pixels" if its still under warrenty take it in. If its not you may be able to get a new screen for it on Ebay.com I use ebay a lot and boy I found thing I though I would never find people are very informative and you will probably need to take the screen you bought to a repair shop and have them place it in for you. this is not a quick fix so I hope this helps.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Had this same issue on right side of 52" about 1 inch from side but had 3 vertical lines that disappeared after 40 minutes. Have Samsung LNT5265FX/XXA and about 16 months old. LCD Panel itself had to be replaced to fix it, fortunately had extended service plan

Is this with all inputs or only some? Also, does it change at all as the set is on for longer periods of time?
Thanks,
Dan

The amplifiers driving that portion of the screen have partially failed.
Sorry, this is a pretty common LCD problem.
If it is under warranty, call them.
If not, plan on replacing the main control module.

This should be repairable. It may be the LVDS Cable or the Main board problem. The only other problem is the T-Con Board.