What vertex said. Just tapping the bad pot revealed the problem right away, it made the image jump significantly in size, but left alone you got that "breathing" effect.
Now that they're all replaced it's solid.
This is what is happening on my G05-802 monitor as well. I had spent approximately 45 minutes trying to mess with the pots on both the deflection board and the PCB and could not get the Y axis to move the image up towards the top of the monitor. Seems like the image wants to hang towards the bottom - and with everything out of wack, the images tend to breath towards the center of the screen.
Looks like my problem is bad pots. Thanks for the tip on where to get these.



