Will a bad Back light Inverter board make horizontal lines all the way across the top of the screen after it warms up ?

SOURCE: red lines across screen

wow this set has several problems that cause almost the same symtoms. There is a b+ filter cap off the flyback that supplys screen drive voltage th the crt that gets leaky and gets warm when the sets on. Also theres a resistor that feeds the voltage that gets warm and a cold solder connection appears but its dosent look like a bad solder connection so just resolder it. as a matter of fact most of those largewr resistors in this set causes all sorts of complaints soI resolder most of them just to stop any problems and a friend in the tv business still told me in one case he had an intermittant crt. and x ray protection cuircut problems.. Hope this helps GOOD LUCK

SOURCE: Thin horizontal line across the entire TV screen

Hi, your correct it is collapsed vertically, you should have re-soldered it before it failed because now you may have to replace the IC but I would re-solder it first as this possibly will fix it, look for a small aluminum (silver colored) heatsink with a black 7-10 pin IC screwed onto the heatsink, flip the main board over and this IC will probably have 2-3 (or more) pins broken, re-solder with 60-40 tin/lead solder, you didn`t give make & model number so thats all the info I can give you, good luck, BMW Rider

SOURCE: Toshiba 27D46 Black Screen - White Horizontal Line

I fixed the problem by taking it to a repair shop

SOURCE: Sony KV-32S66 Picture Rolling Up/Black Horizontal Lines

the problem there is a loose connection on the board,you said that you smacked the right side of the tv and it goes normal.there are parts that should be resolder on the board in order to back into normal operation.

SOURCE: Panasonic 32 inch TV has horizontal lines across screen

REPLACE VERICAL OUTPUT IC ' LA7838