Samsung flat screen plasma tv 40" with intermitent problem

have you looked in the owner's manual ?
Support LED TV UN40H5203AF Samsung TVs
don't know if this the right one for your set, I think the 40" series all have the same manual. I couldn't download it myself. Also on that webpage you can 'chat' to a Samsung rep. who should be able to give you better directions to the correct instructions

15.January.2016

You should have to contact the authorized service centre for Samsung in this case. Plasma screens are not available by open electronic spare part market. Gopakumar Gopalan Google

hi if you brought the tv in november might best to get in contact where you got it from ask them to send a tech out, you won't have to pay as it should be covered by the warranty good luck

regards
shaun

Turn it off in the settings under Settings > PiP

Samsung 1-800-627-4368, Bad Capacitors are common problem in all LCD Flat Screens even in Plasma TVs.

make shure that the computer is set up to display on the screen. To check and see right click on your desktop, click on the option that says screen resolution, and then change your settings from their. The tv will not register that you have a computer plugged into it if the computer is not sending the tv a signal.

Your plasma screen is made up of 1080 verticle lines and now a few of these lines are not working. This is the screen itself and needs replacing.

Try to replace the YSCAN board. If not fix it, then it's the PDP Panel failure.

Without a model number I gather the TV she threw the remote at is a LCD tv? If so look at replacing the set as the LCD panel is now damaged and usually cost more that what a replacement set will. There is no fixing a damaged LCD panel.

Is this on all inputs or is this through a HDMI connection?