Predicta vertical ghost line

[ShartZenith]

This week I've been running the Predicta on the kitchen table every night to monitor its little quirks and problems so my friend and I can hopefully iron them out. One I've noticed is a faint, ghost-line that runs almost vertically through the middle of the screen on all channels. See photo attached. I caught it between screen changes and its a lot easier to see. Any help is appreciated. Thanks!