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HP 21" Color Monitor User’s Guide
English 13
What Video Modes are Supported
Your monitor comes with the standard modes shown in the table below. It also
supports intermediate video modes. With the intermediate modes, the displayed image
may need to be optimized using the buttons on the front panel. All modes are non-
interlaced. Your monitor is GTF* compatible.
*GTF stands for General Timing Formula.
Resolution Refresh rate/Hz
640 x 400 70
640 x 480 60, 85
800 x 600 85
1024 x 768 75, 85
1280 x 1024 75, 85
1600 x 1200 75, 85, GTF
1800 x 1440 80
Minimizing Eye Strain
To avoid screen flicker and minimize eye strain, use the highest supported image
refresh rate for the chosen resolution. It is recommended that you use a refresh rate of
85 Hz. The image refresh rate is the number of times per second that the image is
refreshed.
Minimizing Energy Consumption
If your computer supports VESA monitor power management (available on many HP
computers), you can minimize the power consumed by the monitor.
There are two power saving modes:
• Suspend mode 1 (uses less than 10 W).
• Active off mode 2 (uses less than 3 W). In this mode, the monitor’s front panel
indicator light blinks slowly in green.
To set these power saving modes, refer to the manual that came with your computer.
If your screen is not displaying an image, check the front panel indicator light first —
your monitor may be in a power saving mode.
Using Your Monitor
1 Suspend mode is activated when vertical sync is cut by the video controller.
2 Active off mode is activated when both vertical and horizontal sync are cut by the video controller.