I have a General Electric VCR1 2014w top load VCR from 1981. It has a great image for like 5 seconds then I get lines thelat converge in the moliddle and the screen jumps. It goes back to a great image and does the line/jumps all over again. Belts and idlers are good, tension is good, and the tracking and tracking slow adjustments do nothing to help this.
The link above shows the behavior. Any ideas? The heads look clean. I want to keep a top loader for my Zenith console TV so I'm not looking to replace with a newer one.