HP 21” Color Monitor User’s Guide
Customizing Your Monitor
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 mode1 (uses less or equal than 10W). In this mode, the monitor's front panel indicator light is amber.
•Active off mode2 (uses less or equal than 1W). In this mode, the monitor's front panel indicator light is amber.
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 as your monitor may be in a power saving mode.
Supported Video Modes
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
Factory Preset Modes:
Resolution | Refresh Rate/Hz |
640 x 400 | 70 |
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640 x 480 | 60, 85 |
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800 x 600 | 85 |
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1024 x 768 | 75, 85 |
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1280 x 1024 | 75, 85 |
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1600 x 1200 GTF* | 85 |
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1800 x 1440 | 80 |
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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.
3 GTF - General Timing Formula.