TV Bars I recenly started getting white bars across the top of the tv picture. They come down about 1/6 or 1/7th of the screen. They dont show up in black or dark areas on the screen just when lighter color's are on the screen. Thanks for any help.

Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Switch to the an input that is not being used. The bars are present, go into the menu and reset the tv to factory settings. If the bars are present it would indicate hardware failure.

If the blank bars are not present on the other input, something is going on with the cord, or a setting in your set top box

I'm not too familiar with the LG brand, but if the onscreen stuff looks fine (Volume, menus, etc.) then the panel is OK. Try a picture source other than the one you are using now (Tuner, HDMI, VGA, etc.)

1) If it's the same across all of them, then you will need to replace the main board in the TV.

2a) If it only affects one input, it could either be your video source that is bad (which means TV is OK), or
2b) that certain input port on TV is bad, which would mean you either don't use that input any more, or you replace the main board in the TV.

Hi Anthony,

You're describing what is called letterbox and pillerbox. Letterboxing is when there are two horizontal bars - one at the top and one at the bottom of the screen with a wide picture between. Pillerbox is when there are two vertical bars - one on the left edge and one on the right edge of the screen with a tall picture between.

The settings on your TV (and on your cable box, satellite box, DVD player, etc.) tell the TV how to display a picture that will not fill the screen completely. If the program source (an older video-taped TV show, non-widescreen version DVD, etc) was not originally "shot" or saved in widescreen format, the TV offers you a choice on how to display the image. They ask if they should stretch or zoom to fill the screen (and you have to deal with the skinny / tall images or lost portions of the picture); or maintain the aspect ratio (not stretching or zooming) by leaving a part of the screen blank (grey or black) by inserting bars left and right or top and bottom of the screen.

Start out by telling the devices that send pictures in a format that matches you TV's screen ratio. I am assuming you've got a wide screen HDTV which would mean it should be set to "16 x 9" (a.k.a. 16:9) ratio display. If you have it set for 4 x 3 (a.k.a. 4:3) you should change it. Look for a setting on your TV that asks about stretching, zooming, etc. as this will be an issue when receiving picture from an off air antenna on your house when a TV station is airing an older, non-wide screen format TV show or movie.

TV signals provided by Cable TV or Satellite provider must be HDTV type signals. If you have the standard TV service (non-HD) no picture sent by them will ever fill the screen. This is because Standard Definition TV (SDTV) is not capable of those types of signals. You will have to bump up your subscription to HDTV service to get full screen pictures.

I hope this helps!

If you unplug the set and let it sit till it dries out you may be able to save it, but turn it off and unplug it before it burns up. There are several boards and chips that can be damaged from the liquid. Most likely it is more than one that has been damages but if it dries out with out shorting out it may be saved. If your lucky,

U freeze video games 10-20 mins in video game alot of time.Never pause or freeze any kinds of video image in Plasma tv.It very easy cause to burn in Plasma tv problems alots.

Sounds like hum bars if there white bars.Try disconnecting the ground outside at your cable hookups or sat etc.

It sounds like you're watching wide screen content on a 4:3 tv, so the screen may be zoomed in so that the bars that would normally be on the top and bottom are not showing. Because the picture is zoomed in, images that would be at the top and bottom are off the screen. If you're watching from a home receiver (Uverse, DirecTv, Xfinity, etc.) you need to change the video settings to let the receiver know that your TV's aspect ratio is 4:3 (full screen) and not 16:9 (widescreen). Also, if your channel lineup has the option of watching CNN on a standard definition channel, that would also help because the shape of the image would be what your tv was designed for. If you watch 16:9 programs, you will have to choose letter box mode (bars on top and bottom because the shape of the widescreen image does not match the shape of your tv), pillar box mode (bars on either side) zoomed, or stretched. Stretched will make the shape of everything appear distorted, as it squeezes a widescreen image on the sides to make it narrow enough, so that everyone will have tall and skinny heads like an old Kung Fu movie. The sharpest picture would likely be to watch 16:9 (hi def) content in letterbox mode (bars on top and bottom) so at least you get the proper aspect ratio that the sports were recorded in, and it comes from a sharper source (HD vs SD). I would just deal with the bars, because even with a widescreen tv, there will sometimes be bars because that's how programs are sometimes recorded, for different visual impact or cinematic effect.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/reginald_bec291de192ca44f

Hi,
I hope your TV model is Sony KV-G21M1 and you see color bars as horizontal lines across the screen.
Let me now are you tech guy or know how to repair TV to guide you further.

Problem with the vertical linearity..some electronic component in vertical circuit gone bad..probably, a dried up electrolytic capacitor..usually 100uf/50v.u need a serviceman to fix that.thanks,hope this help u