ViewSonic CD4200 User Manual page 50

The picture is not sharp.
The picture moves.
The picture is doubled or tripled.
The picture is spotted.
ViewSonic CD4200
▪ The signal source may be weak.
▪ The provider may be experiencing difficulties.
▪ Check input connections.
▪ Check the Sharpness of Picture Settings.
▪ The source signal may be weak.
▪ The provider may be experiencing difficulties.
▪ Check input connections.
▪ The source signal may be weak.
▪ Check input connections.
▪ There may be interference from other appliances nearby or
around the LCD.
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