I took apart my 32" LG 32LB560B to re-glue the reflectors for the backlight, when i put it back together, the backlight was fixed but the picture was gust green vertical lines where the no signal notification was.
Check the connections, make sure that ribbon cables are good and in position and not broken, also check that no contact or open circuit is touching metal.
Check the connections, make sure that ribbon cables are good and in position and not broken, also check that no contact or open circuit is touching metal.