Disclaimer All of these tips apply only for the 8399-XXX series of monitors. Let your techs show you the ropes on monitor repairs, if you're going to be messing around with any live equipment. Be especially careful when doing focus adjustments, aside from personal risk you can smoke your board. Handy-dandy guide for repairing mono monitor problems Screen wrap problem or the horizontal width has grown too large and the screen appears to be wrapping back around on itself. Screen is shrinking from both sides.
Characters seem to be wiggling or vibrating.
On all white displays or on white backgrounds there appear bright horizontal streaks. Top of display appears to losing a few lines of text sort of gradually getting darker on top few lines. Display is too large vertically and cannot adjust in. Save all of the magnets from any scrapped monitor yokes, you'll need them to adjust display geometry with the new CRT's. The key to flyback jitter is when the display shrinks or jerks both top, bottom and both sides simutaneously.