I think the problem is due to the vertical output coupling capacitor is failing,
causing a fold at the top of the picture.these are white 'retrace lines'
visible as a result of the fold.
The repair require replacement of the capacitor by a qualified tech.
Screen voltage has also gone up to high. I suggest you to check solder connects around flyback.
This is a website of a technician service www.tvrepairjacksonvillefl.com , you can get more details for the solution and know the repair price.
black
November 2012