I just picked up a broken Apple IIe on craigslist. I am working on replacing the motherboard video rom chip and CPU but that is not what this post is about. I got a monitor with the computer, Taxam company. I tested the monitor with my IIGS. The monitor works but there are slow moving areas of horizontally compressed display that start from the bottom of the screen, slowly move to the top, then restart at the bottom. Only one compressed area exists at a time.
What can I do to fix this? I have included a picture below: