Hi There
The black line problem is a very easy fix all it is a dry joint of solder in the top of the screen.
take the back of the tv off and remove a few boards and you will see there are 7 little boards right at the top of the screen they have two screws in each of them all you have to do is where ever the black line is on the screen take that one litte board off and re solder the joints on it
This will fix the problem straight away
