Bush 50inch LED TV model50/311F Top half and slight left hand side blocked out with lines idea what is wrong?

SOURCE: Red line across top half of screen

Uh-Oh.. Sounds like the BGA RAM in the video circuit. (These units are Intel based and Core 2 duo if posted correct).. We can repair if you need help and its under warranty and sorry its not a home remedy situation..

ikenfixit.com

SOURCE: Panasonic PT 47WX53 CinemaVision TV

http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

SOURCE: Half of screen blank

it may have been spoilt, TI-89 Titanium calculators are not very lasting. You may want to try the resetting all memory (2nd 6 F1 3 Enter)

SOURCE: my Lcd tv has a thin green line running from top

Unfortunately this is a problem with the screen & the only solution is to have it replaced. If it is still under warranty then there should not be any problem if however it is not, then it would be uneconomical to get the screen replaced as this can be very expensive.

SOURCE: when my LG 42inch LCD tv is off for a while and

This problems it is the causes by the board that call the T-CON decoders board,this board sit at the bottom in the middle of the LCD screen panel.This T-CON decoders board is started dying to causes these problems or the fibers opotic cable connections is loses or frail damges to causes slightly signal tranmittion from the T-CON decoder board to the LCD screen panel.Just used the tv,when the problems is there for good.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-CON decoders board for the replacement.