White horizontal lines flicker and screen goes off.

Sounds like the graphics card just died. You will need that repaired.

The controller board for the screen is going bad. check shopjimmy.com for replacement parts. It's not a difficult job to do. Once the back of the TV is removed, you'll see it near the center of the screen.

the driver board is bad in the monitor. Has it been in a place that is super hot like in a car? If the verticle driver chip disconnects from the matrix driver array, it will all squish into a single line in the middle of the screen like you are describing.. might try opening and blowing where the driver board connects to the LCD matrix (bunch of connectors on a plastic flat cable/bus connecting to the end of the LCD panel.. heating them could allow them to reconnect.. Its worth a try, right? It has worked for me about 60% time.

The problem must be with its main digital processor board. It will be best to make it confirm. Contact any service technician. Try this link. http://electronicshelponline.blogspot.com/ There are more than two thousand and four hundred posts. All are related to television and other domestic electronic equipment service help.

Drop the resolution within the ps3 try 720p.

vertical collapse. usually not to expensive to fix.

Absolutely right about the transistor and also check any adjacent resistors to the transformer and to the line output transistor. Good luck.

I fixed the problem by taking it to a repair shop

ok,your monitor has a defective vertical ic.when vertical ic is defective you can see the horizontal line.

Something is breaking down. Possibly a specific ceramic capacitor on the main power pcb that has been troublesome. Usually there is just a loud pop and the screen goes dead. If the set is less than a year old it is still on parts warranty and the technician could just change circuit boards until the problem is gone.