Lenovo L2240p manual Selecting a supported display mode, Understanding power management

Selecting a supported display mode

The display mode the monitor uses is controlled by the computer. Therefore, refer to your computer documentation for details on how to change display modes.

The image size, position and shape might change when the display mode changes. This is normal and the image can be readjusted using automatic image setup and the image controls.

Unlike CRT monitors, which require a high refresh rate to minimize flicker, LCD or Flat Panel technology is inherently flicker-free.

Note: If your system has previously been used with a CRT monitor and is currently configured to a display mode outside the range of this monitor, you may need to re-attach the CRT monitor temporarily until you have re-configured the system; preferably to 1680x1050 at 60Hz, which is the Native Resolution Display mode.

The display modes shown below have been optimized at the factory.

Table 2-3.Factory set display modes

Addressability	Refersh rate
PAL	50Hz
640x350	70Hz
640x480	60Hz,66Hz,72Hz,75Hz
720x400	70Hz
800x600	60Hz,72Hz,75Hz
1024x768	60Hz,70Hz,75Hz
1152x864	75Hz
1280x1024	60Hz,72Hz,75Hz
1440x900	60Hz,75Hz
1600x1000	60Hz
1680x1050	60Hz,75Hz

Understanding power management

Power management is invoked when the computer recognizes that you have not you’re your mouse or keyboard for a user-definable period. There are several states as described in the table below.

For optimal performance, switch off your monitor at the end of each working day, or whenever you expect to leave it unused for long periods during the day.

Table2-4.Power indicator

	State	Power Indicator	Screen	Restoring Operation	Compliance
	On	Steady green	Normal
	Standby/	Steady amber	Blank	Press a key or move the	ENERGY STAR
	Supsend			mouse.
				There may be a slight
				delay reappears.
				Note: Standby also occurs
				if there is no image output
				to the monitor.
	Off	Off	Off	Press a key or move the	ENERGY STAR
				mouse.
				There may be a slight delay
				before the image reappears.
2-6L2240p Wide Flat Panel Monitor User’s Guide