Samsung SyncMaster XL30 Owner's Manual page 13

Adjust buttons [
]
Power button [ ] /
Power indicator
See PowerSaver
functions. For energy conservation, turn your monitor OFF when it is not needed, or when
leaving it unattended for long periods.
Rear
(The configuration at the back of the monitor may vary from product to product.)
DVI-D
Push the button to adjust brightness.
▼ : The screen is getting dark.
▲ : The screen is getting bright.
Use this button for turning the monitor on and off. /
This light glows blue during normal operation, and blinks blue once
as the monitor saves your adjustments.
described in the manual for further information regarding power saving
Only digital signals can be input to this terminal. Therefore,
only connect the DVI terminal of your PC to this terminal.