Symptoms: Monitor would be fine upon turning the game on. After a few minutes, the screen would shrink toward the center of the machine making it unplayable.
Solution: First, a cap cit was done. After the cap kit, the screen shrunk to a horizontal line. After that, tested D302, R402, R303, R627, and D603. All tested fine, so I moved on to replacing U601. Fired the monitor up, and worked great. Had to make some adjustments to the colors (Green drive was up too high, blue drive not high enough) then screen looked great.
Hope this can help someone else in the future.
Solution: First, a cap cit was done. After the cap kit, the screen shrunk to a horizontal line. After that, tested D302, R402, R303, R627, and D603. All tested fine, so I moved on to replacing U601. Fired the monitor up, and worked great. Had to make some adjustments to the colors (Green drive was up too high, blue drive not high enough) then screen looked great.
Hope this can help someone else in the future.