I HAVE A LG50PQ30 PLASMA TV,WHICH IS JUST OVER A YEAR OLD AND OUT OF WARRANTY. AFTER THE TV HAS BEEN ON FOR A FEW HOURS THERE IS HORIZONTAL LINES APPEAR ABOUT 6 INCHES FROM THE TOP OF THE SCREEN IT STARTS OFF ABOUT 6 INCHES DEEP BAND THEN IT TURNS ALMOST YELLOW/RED/GREEN THEN GOES BLACK AND WORKS ITS WAY DOWN THE SCREEN UNTIL YOU CAN ONLY SEE THE BOTTOM HALF OF THE SCREEN ( JUST THE LEGS) WHEN YOU TURN THE TV OFF FOR A WHILE IT THEN RETURNS TO NORMAL FOR ANOTHER WHILE BUT IT IS STARTING TO HAPPEN MORE OFTEN, ANY IDEAS WHAT IS WRONG AND IF IT IS EXPENSIVE TO FIX

Check all your cable and antenna hook ups for any issues. Good thing it is under a year old because you still have factory warranty on this and if you don't find any issues with your hook ups there is probably a bad board on the set and it needs replaced which need to be done under warrranty, if you attempt this yourself you will void any warranty you have. Plazma Tv's have logic buffer boards that control the X and Y axis. I believe one of these is failing

Hi,


The most common cause for the loss of picture is a bad Horizontal Output Transistor (HOT). but I would suggest you get a detailed estimate. I think that this would cost you about $60.

The horizontal lines means the vertical amplifier or deflection system has failed. There are over 100 components in this section and any one of them, or most of them can be at fault. However, the most common failure is the VOT or vertical output transistor (which is often buried inside a chip).

The repair will cost around $150 plus or minus.

FEW TROUBLESHOOTING STEPS YOU CAN TRY:

ONE: Do a hard reset (just to make sure there is nothing in the coding that is fowling things up). Unplug the power cord; leave it disconnected for 4 hours. That will restore everything to factory defaults when you power it back up.

TWO: Do the "whacking test" by banging your fist on a few strategic places to see if there are any cold solder joints or loose wires acting up inside the set.

If the above steps don't solve ur problem then I suggest you to go for a repair if you don't have any knowledge of repairing it.

Goodluck...

replace the horizontal output IC ,can order @ matselectronics.com

Possibly could be the Y buffers --if the are next to each other could be a bad connection on a ribbon cable ---you need to call for service

How old is the tv overall? The tv can be repaired.
https://eservice.sony.com/webrma/web/index.do
Follow this link and you can inquire about getting service for the tv.
Thank you,
Lee

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

All I can say is when you watch T.V. the plasmas run off of plasma gas and when you leave something on for so long it burns in the screen. I have the same T.V. and when watching like the weather channel it leaves lines but they go away. If yours are permanent then you can't do anything, but it may help if you go on your remote and go to "menu" then look for "setup" and scroll down with the arrows on your remote. Look for "screen burn protection" and select "white screen". This will make your whole screen white and it may take out the lines. If you let it sit white it won't hurt it. All one color won't hurt, the only thing that hurts is like bright white lines in front of a dark background. Just give your T.V. a break from time to time ESPECIALLY ON VIDEO GAMES. T.V. shows that are HD usually have their channel icons that move or are very dim and they won't hurt. Just go to what I told you and let it sit about 20 minutes, if that doesn't help, then the T.V. you have i believe comes with a 2-year standard warranty and if it's under warranty take it back if you have the reciept. If no reciept then call 1-800-SAMSUNG.

Sounds a lot like the Power supply board. But you have to check it out further to be sure. Email me back and we'll chat. GURU JAY

Too late now but I hope you had it serviced while it was still on parts warranty. With a couple of exceptions, service on those is by major pcb replacement.