The picture on my screen has vertical lines running down it. The lines periodically become more and less visible. The picture is especially bad when I try to watch a dvd. What could be the problem and how much should it cost to repair?
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Usually, this occurs on CRT projection TV's, and occasionally on CRT ... Dark, light, or colored bars can be seen rising slowly through the picture, ... Known as "hum bars" or "common-mode noise," these result from AC power line hum coming ...
Jun 17, 2015 - Flat Screen TV Has Lines Going Through Screen - Possible Bad ...inch LCD TV which is showing lines (vertically) and getting extremely hot. ..... If you leave the projection TV on for a certain amount of time does it ..... If so the plasma gas is most likely causing the screen to become distorted or color issues.
If there is no picture and 3 vertical lines in the center of the screen, stop. Turn off TV. You have no horizontal deflection happening. Lines will burn into crts and be permanently visible after repair.
No horizontal deflection is caused by Horizontal sweep circuit failure, maybe flyback transformer and associated components. More than a simple do-it-yourself repair.
These lines are called retrace lines they are caused when the blanking pulse is insufficient to turn off the current to the CRTs (guns) during the retrace period (the time when the CRTs internal electron gun is returning to the start position after "painting" the picture on the screen). Since this is a signal problem, it will require troubleshooting to figure out why This is occurring. If you do not have a background in electronics and a working knowledge of TVs I would suggest that you have a qualified TV technician examine and repair this TV for you.
Ok we have to resolve the extent of the problem before diagnosing it. Does the black line/green bar show on all inputs and the tuner? Is it visible in the OSD (on screen display)? if yes to all of these questions, it could be a panel drive problem or a bad plasma panel. A picture would help diagnosis