Hi Pat. Had to chuckle when I saw your post. This monitor is in the Space Fury I got from you last year. I'm just now getting around to fixing it. The boards are good, they're my test rig. I've never had a loose G08 yoke before. To make sure I double checked it and it's tight. The symptom doesn't point to an out of position yoke anyway. Something is effecting the signal globally. It's either on the input side or in the error correction. I'm going to walk through the input side and see if I can pinpoint where the signal goes bad. One thing that Mark suggested today was the input protection board. That is one thing I did not check last night so I'll start there. Stay tuned.