Warped, skewed or wobbly picture geometry on a CRT.
1 repair log
+42 photosSuccessful repairSony — CPD-G420
The geometry was off and it started clicking ominously during warmup. The fix turned out to be a G2 voltage calibration via WinDAS over serial, following a suggestion from the community. Now one of three 19" PC CRTs in the collection.