My monitor sony ssm-721AMR rolls until it warms up or the camera warms up. This is a backup camera for a 36 ft RV 1994 model. Camera is a sony ssc-520AM B/W
Fixed mine! Take off the monitor from the dash. Take the cover off the monitor. There are four seperate white plastic turn dials available inside the case. Each of these have seperate controls the ones on the top are for brightness and focus while the ones on the bottom of the casing are for vertical and horizontal hold fine tuning, use a screwdriver to adjust. Save you money and do this yourself it's easy as pie.
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