White Lines

[mbates14]

they look like retrace lines.

[Eric H]

These look more like the lines you get from having the brightness turned up too high rather than the ones from Macrovision which are usually only at the top.

It's hard to tell from a screen shot but that picture looks either too bright or not enough contrast.

Do the brightness and contrast controls work correctly, in other words taking the picture from completely washed out to overloaded or completely dark to way too bright?

A weak CRT can cause retrace in some cases, something weak in the video circuits can do it too.
The blanking pulse comes from the Vertical circuit i believe so a problem there can cause a problem.

What has been done to the set as far as electronic restoration?