The fault is in the vertical scan. The top 2 lines (or so) are spread out, so that the top row of characters appears to have black lines running through them. In other words the vertical scan is very non-linear at the top. Adjusting the vertical linearity control improves things a little, but reducing the spacing at the top increases it at the bottom. What is odd is that the vertical position control affects the fault as well -- the problem gets worse as the picture is moved up the screen. This seems to rule out a problem with the ramp generator, since the vertical position control operates by applying a DC current to the yoke. The problem gets better as the monitor warms up. I've not dived into it yet -- and I suspect the electrolytics in the vertical output stage. I am wondering if anyone's seen this before and can suggest a possible cause. -tony