Samsung SyncMaster 400DXn Owner's Manual page 171

Every 30 minutes, change the characters with movement.
All area display Moving image together with Logo periodically.
- Cycle: Display moving image together with Logo for 60 seconds after 4 hours in use.
The best way to protect your monitor from Image retention is to turn Power off, or set your PC, or
System to operate a Screen Saver program when you are not using it. Also Warranty service will be
limited based on instruction guide.
Apply the Screen Scroll function on Product
Apply the Screen Scroll function
- Symptom: Horizontal Bar with Black Color move up and down.
- Select method
. Instruction Guide : OSD Menu -> Set Up -> Safety Screen -> Screen Scroll
. Time Interval : 1 ~ 10 hours ( Recommend : 1 )
. Time Period : 1 ~ 5 second ( Recommend : 5 )
Note
• ( Please check CD's User Guide at "OSD Function", some model's will not available )
Apply the Screen Pixel function on Product
Apply the Screen Pixel function
- Symptom: Dot with Black Color move up and down.
- Select method
. Instruction Guide : OSD Menu -> Set Up -> Safety Screen -> Pixel
. Time Interval : 1 ~ 10 hours ( Recommend : 1 )
. Time Period : 10 ~ 50 second ( Recommend : 50 )
Apply the Screen Bar function
- Symptom: Horizontal / Vertical Bar with Black Color move up and down.