Picture has a horizontal row

Question edited for clarity.

It is unusual to have nothing which leads me to believe the power board has failed. Try a power reset, remove the wall plug for 5 minutes. Plug back in, press and hold the power button on the set, for 12 seconds. If that doesn't fix it, take it in for repair. This is a high specs, low budget make, NZ$928.00 new. The model is only available in New Zealand. We are in North America.

They are known for failing with no picture, but have sound.

https://www.google.com/search?q=Konka+KUD50GT776AN+no+picture%2C+no+sound

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hello sir

Bad Tcon board or panel...if its the panel the set can't be repaired

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window of the home page, to get gathered some pages which has the details of practical experiences to the author of that site.

Vertical jumping may have a vertical hold issue, horizontal may have a horizontal hold issue. Most older tv sets will have some knobs or adjustable screws for vertical and horizontal hold. Turn your set on and check for these knobs on the back of your set and adjust until your picture is in as well as you can get it

psess the volume  up and down button together on the front pannel of the tv and then shut off the tv and it will stop scrolling.

My Konka LCD model KDL32AT23U Displayed a picture, then vanished, showing different colored vertical lines in horizontal blue bands.Then I could not turn it off with the remote or standby button on the side.Only with the main switch.What's wrong??
This is the same problem posted by kukish on july 26,2008

do you have cable to the set or are you on rabbit ears if on ears adjust antenna for the strongest signal.

Keep in mind that there is only one set of RCA (or composite) inputs to this tv. For the video, you have the option of using the RCA jacks OR S Video input. When using the composite set of inputs you are using set of jacks (looking from the back) to the right of the tv that are furthest away from you. The audio for this set of jacks are the second and third composite jacks (counting from the right).

is this a horizontal black line going up or down? if yes, this sympton is caused by a trouble in the integrated circuit or in the vertical oscillator circuit. this symptons has 2 variations. one is the intermittent rolling of the picture. this referred to as the "loose vertical hold" the other variations is the continuous upward or downward rolling of the picture