Try a blanking tube. There is both vert retrace & a white line
going down the left side.
Also be sure you can turn the brightness down. If
not it may need a set-up by the book, no big deal.
This set should come out quite nice. Keep in mind
even when new they are not bright sets, use in subdued lighting.
BTW the volume knob will have the Zenith color triad on it.
Tons around I am sure.
73 Zeno
