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HP S1931a, S2031, S2031a, S2321a, S2331, and S2331a LCD Monitors - Using and Adjusting Your Monitor

This document describes using and adjusting the S1931, S2031, S2031a, S2321a, S2331, and S2331a LCD monitors.
Figure : S2031 LCD Monitor
S2031 LCD Monitor

Installing drivers

Install the software from the CD, or download them from the Internet as follows:

Installing drivers from the CD

To install the monitor driver from the CD:
  1. Insert the CD in the computer CD drive.
    The CD menu appears.
  2. Select the language.
  3. Click Install Monitor Driver Software.
  4. Follow the on-screen instructions.
  5. Restart the computer.
  6. Check that the proper resolutions and refresh rates appear in the Display Properties window in the Control Panel.

Installing drivers from the Web

To download the latest version of drivers and software files from the HP Support Web site:
  1. Select the country/region.
  2. Select Download Drivers and Software.
  3. Enter the model number of the monitor, for example S2031a.
    The software download pages for the monitor display.
  4. Make sure the system meets the requirements given.
  5. Download and install the driver and software files by following the steps on the screen.

Monitor control buttons

Monitor control buttons are located on the front panel of the monitor.
Figure : Monitor control buttons
Monitor control buttons.
Open, or select the OSD menu.
The Select Minus button navigates forward through the OSD menu and decreases the adjustment levels.
If the OSD menu is inactive, press to open the volume level adjustment menu.
The Select Plus button navigates backward through the OSD menu and increases the adjustment levels.
If the OSD menu is inactive, press to open the volume level adjustment menu.
Press the OK button to select a highlighted function.
Power button and LED. Turn the monitor on or off. The Power button is located on the bottom center of the monitor.
Power LED. When the monitor is on and in normal operating mode, the power light is blue.
When it is amber, the monitor is in sleep mode.

Auto-Adjustment (VGA input only)

Optimize the screen performance for the VGA input by using the Auto-Adjustment in the OSD software or downloading the HP Adjustment Pattern Utility from the HP website.
This software can correct the following conditions:
  • Fuzzy or unclear focus
  • Ghosting, streaking, or shadowing effects
  • Faint vertical bars
  • Thin, horizontal scrolling lines
  • Off-center picture
To use the auto-adjustment feature:
  1. Allow the monitor to warm up for 20 minutes before adjusting.
  2. Press the Menu button, select Image Control, and then select Auto-adjustment from the OSD menu.
    If the result is not satisfactory, continue with this procedure.
  3. Download and run the HP Adjustment Pattern Utility from the HP website:
    1. Select the country/region.
    2. Select Download Drivers and Software, enter the model number of the monitor, for example S2031a, and then press Enter.
    3. Select your operating system, and click Next.
    4. Click Utility - Tools, and then click HP Adjustment Pattern Utility. On the download page, click Download.
    5. Follow the steps on the screen to run the utility.
      Figure : Setup test pattern
      Image of the setup test pattern.
    6. Press the ESC key to exit from the test pattern.

Using Onscreen Display (OSD)

Follow these steps to adjust monitor settings with the OSD menu.
  1. Turn on the computer and monitor.
  2. Press the Menu button to access the OSD menu.
    The OSD main menu opens.
  3. To navigate through the Main or Submenu menus, on the monitor front panel press the + (plus) button to scroll up, or the (minus) button to scroll down.
  4. To select an item from the OSD Menu, use the + (plus) or - (minus) buttons to scroll to and highlight your selection. Press the OK button to select the highlighted item.
  5. When a menu item is selected and its corresponding screen appears, use the + or buttons to adjust the scale of the item.
  6. Press Save to save the setting, or Cancel to discard the setting and return to the previous menu. Press the Menu button to exit the OSD.
    When a menu is displayed, if the buttons remain untouched for 10 seconds, adjustments and settings are not saved and the menu closes.
Main Menu Options
Submenu Options
Input Select
Selects the input source for VGA and DVI. (select models
Adjusts the brightness level of the screen.
Adjusts the contrast level of the screen.
Image Control
Adjust the image on the screen. The ambient brightness sensor can also be enabled or disabled (only applicable to some models)
Auto adjustment
Automatically optimizes the image to display the ideal setting.
Horizontal position
Adjusts the horizontal position of the image.
Vertical position
Adjusts the vertical position of the image.
Minimizes any vertical bars or stripes visible on the screen background. Adjusting the clock also changes the horizontal screen image. VGA input only.
Clock phase
Adjusts the clock phase of the screen. This adjustment eliminates all horizontal noises to enable clearer and more lifelike images and characters. VGA input only.
Selects the color displayed on the screen. The factory default setting is 6500 K or Custom color, depending on the model of your monitor.
Custom color
To select and adjust the color range:
R to set the level of red
G to set the level of green
B to set the level of blue
To set the color of the screen to comply with color standards used in the imaging industry.
Selects the language displayed on the OSD menu. The factory default setting is English
Selects settings to manage the OSD and other monitor settings.
Adjusts the volume.
OSD control
Adjusts the position of the OSD menu displayed on the screen.
OSD horizontal position – adjusts the visual position of the OSD menu to the right or left of the screen. The factory default horizontal position value is 50.
OSD vertical position – adjusts the visual position of the OSD menu up or down the screen. The factory default vertical position value is 50.
OSD transparency – adjusts the transparency to enable transparent background information under the OSD.
OSD display time – sets the OSD display time (in seconds) after the last button is pressed . The factory default setting is 30 seconds.
Power saver
Enables the energy-saving function. Select On or Off. The factory default setting is On.
Mode Display
The resolution, refresh rate, and frequency information displays when the OSD main menu is accessed. Select On or Off.
Monitor Status
The operational status of your monitor displays when you turn on your monitor. Select the position where the status information is displayed from Top, Middle, Bottom, or Off.
DDC/CI support
Controls some OSD menu functions, such as brightness, contrast, and color temperature, on your computer if allowed. This feature can be set as On or Off.
Power indicator on the front panel
Power on/off the indicator (LED) on the power button. If the indicator is set as Off, it will be off all the time.
Sleep timer
The following timer adjustment menu options are available:
Set the current time - to set the current time in hours and minutes.
Set the sleep time - to set the desired time when your monitor works under the sleeping mode.
Set the opening time - to set the desired time when your monitor is awakened from the sleeping mode.
Timer - Set On or Off status for the Sleep Timer. The default setting is Off.
Sleep at once - to activate the sleep mode for your monitor
Default video input
When the monitor is connected to two active and valid video sources, select one of them as the default video input.
The default signal input is DVI.
Changes you make will be activated after you restart the computer.
Selects and displays important information about the monitor.
Restore factory settings
Returns all OSD menu settings to the factory default settings.

Adjusting screen quality

The auto adjustment feature automatically fine-tunes the image quality for display size, position, clock, and clock phase each time a new video mode is displayed. For more precise adjustments of VGA input, download and run the HP Auto Adjustment software from the HP website.
If you want additional image quality improvement, use the Clock and Clock Phase controls of the monitor to fine tune the image. Use these controls only when the auto-adjustment function does not provide a satisfactory image.
The Clock controls are adjustable only when using an analog input. These controls are not adjustable for digital inputs.
The Clock must first be set correctly since the Clock Phase settings are dependent on the main Clock setting.
  • Clock - Increase or decrease the value to minimize any vertical bars or stripes visible on the screen.
  • Clock phase - Increase or decrease the value to minimize video distortion or video jitter.
Use these controls only when the auto adjustment function does not provide a satisfactory monitor image in analog mode. To obtain the best results, download and use the auto-adjustment pattern software utility from the HP website:
  1. Allow the monitor to warm up for 20 minutes before adjusting.
  2. Display the adjustment-pattern application provided on the CD.
  3. Access the OSD menu, and then select Image Control.
  4. Set the main Clock settings correctly first, because the Clock phase settings depend on the main Clock settings.
    If the monitor images become distorted, when adjusting the Clock and Clock phase values, continue adjusting the values until the distortion disappears.
To restore the factory settings, access the OSD menu, select Restore factory settings, and then press OK.

Identifying monitor conditions

Special messages display on the monitor screen for the following monitor conditions:
  • Input Signal Out of Range: Indicates the monitor does not support the input signal because the resolution and/or refresh rate are set higher than the monitor supports.
    Change your video card settings to a lower resolution or refresh rate. Restart your computer for the new settings to take effect.
    The maximum resolution rates are as follows:
    • For the S1931a monitor: 1366 x 768 @ 60 Hz
    • For the S2031 and S2031a monitor: 1600 x 900 @ 60 Hz
    • For the S2321a monitor: 1920 X 1080 @60 Hz
    • For the S2331 monitor: 1920 X 1080 @60 Hz
  • Monitor Going to Sleep: Indicates the screen display is entering a sleep mode. The speakers (select models) are turned off in sleep mode.
  • Check Video Cable: Indicates a video input cable is not properly connected to the computer or monitor.
  • No Input Signal: Indicates the monitor is not receiving a video signal from the computer on the monitor video input connector. Check whether the computer or input signal source is off or in the power-save mode.
  • Auto Adjustment in Progress: Indicates the auto-adjustment function is active and in process.


The following table lists possible problems, the possible cause of each problem, and the recommended solutions.
Possible Cause
Power LED is not on.
Power is not on.
Make sure that the power cord is properly connected to a grounded power outlet and to the monitor, and the monitor power button is on.
Screen is blank.
Power cord is disconnected.
Connect the power cord and turn on the power.
Power button on front panel of the monitor is turned off.
Press the front panel power button.
If pressing the power button has no effect, press and hold press and hold OK, +, and press the Power button.
Video cable is improperly connected.
Make sure that the video cable is connected correctly.
Screen blanking is active.
Press any key on the keyboard or move the mouse to inactivate the screen blanking utility.
Screen image appears distorted; text is fuzzy or blurred; image quality is degraded.
The computer's graphics card resolution is set lower or higher than the monitor's native resolution.
Set the computer’s display resolution to the same mode as the monitor’s recommended native screen resolution to provide the best picture quality.
Image appears blurred, indistinct, or too dark.
Brightness and contrast are too low.
Press the OK button on the front panel. If this does not correct the image, press the Menu button to open the OSD Menu, and adjust the brightness and contrast scales as needed.
Picture bounces, flickers, or wave pattern is present in the picture.
Interference from another electrical device.
Move electrical devices that may cause electrical interference as far away from the monitor as possible.
Image is not centered
Position may need adjustment
Press the Menu button to access the OSD menu. Select Picture/Horizontal Position or Vertical Position to adjust the horizontal or vertical position of the image.
Input Signal Out of Range. - Change resolution setting is displayed on screen.
Video resolution and/or refresh rate are set higher than what the monitor supports.
Restart the computer and enter Safe Mode. Change the settings to a supported setting. Restart the computer so that the new settings take effect.
Screen is black or displaying at a lower resolution while displaying high-definition (HD) content (select models).
Check if your monitor and computer support HDCP.
Unable to hear audio from built-in speakers (select models only).
Volume is muted or too low.
Do the following:
  • Ensure the source signal is good by using headphones at the source.
  • Press the + or - buttons on the front of the monitor to adjust the volume.
  • Press the Menu button to access the OSD menu. Select Management, and then select Volume to adjust the volume.
  • Ensure speaker volume is not muted or too low. Click Start, Control Panel, and Hardware and Sound. Under Audio Devices and Sound, click Adjust system volume. Under Main Volume, move the slider up.
Monitor is always in sleep mode (amber LED).
The computer power switch should be in the On position.
The computer graphic card should be snugly seated in its slot.
Check that the monitor video cable is properly connected to the computer.
Inspect the monitor video cable, and make sure that none of the pins are bent.
Check that your computer is operational: Press the Caps Lock key and observe the Caps Lock LED found on most keyboards. The LED should either turn on or off after hitting the Caps Lock key.
No Plug and Play.
In order for the Plug and Play feature of the monitor to work, you need a computer and graphic card that are compatible with Plug and Play. Check with your computer manufacturer.
Check the monitor's video cable, and make sure that none of the pins are bent.
Make sure that the monitor drivers are installed. Monitor drivers are also available at: http:// www.hp.com/support

Power-saver feature

When the monitor is in normal operating mode, the Power light is blue.
The monitor supports a reduced power state which occurs if the monitor detects the absence of either the horizontal sync signal and/or the vertical sync signal. Upon detecting the absence of these signals, the screen goes blank, the backlight turns off, and the Power light turns orange.
The power saver feature must be activated on your computer for this feature to work. See your computer documentation for instructions on setting energy-saver features (sometimes called power-management features).

Tips and recommendations

  • Unplug your monitor from the wall outlet before cleaning. Clean the monitor plastics with a clean cloth dampened with water. Do not use liquid cleaners or aerosol cleaners. Clean the monitor screen with an antistatic screen cleaner.
  • Do not open your monitor cabinet or try to service this product yourself. Adjust only those controls that are covered in the operating instructions. If your monitor is not operating correctly, or has been dropped or damaged, contact your HP authorized dealer, reseller, or service provider.
  • Use only a power source and connection appropriate for this monitor, as indicated on the label or back plate of the monitor.
  • Never disconnect the monitor by pulling the cord.
  • Turn your monitor off when not in use. You can substantially increase the life expectancy of your monitor by using a screen saver program and turning off the monitor when not in use.
  • When removing the monitor base, place the monitor face down on a soft flat area to prevent it from getting scratched, defaced, or broken.
  • Burn-in image damage might occur on monitors that display the same static image on the screen for a prolonged time. To avoid burn-in image damage on your monitor, always start a screen saver or turn off the monitor when it is not in use for a prolonged period.






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