HP Pavilion 27-inch Displays User Guide 5 - Page 34

Optimizing image performance (VGA analog input)

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Optimizing image performance (VGA analog input) Two controls in the on-screen display can be adjusted to improve image performance: Clock and Phase (available in the OSD menu). NOTE: The Clock and Phase controls are adjustable only when using an analog (VGA) input. These controls are not adjustable for digital inputs. The Clock must first be set correctly since the Phase settings are dependent on the main Clock setting. Use these controls only when the auto-adjustment function does not provide a satisfactory image. ● Clock-Increases/decreases the value to minimize any vertical bars or stripes visible on the screen background. ● Phase-Increases/decreases the value to minimize video flickering or blurring. NOTE: When using the controls, you will obtain the best results by using the auto-adjustment pattern software utility provided on the disc. When adjusting the Clock and Phase values, if the monitor images become distorted, continue adjusting the values until the distortion disappears. To restore the factory settings, press the Menu button and select Management > Factory Reset > Yes in the OSD. To eliminate vertical bars (Clock): 1. Press one of the three buttons on the right side of the monitor to activate the buttons. 2. Press the Menu button on the right side of the monitor to open the OSD, and then select Image Control > Clock and Phase > Clock. 3. Press the + (Plus) or - (Minus) buttons on the right side of the monitor to eliminate vertical bars. Press the buttons slowly so that you do not miss the optimum adjustment point. 4. After adjusting the Clock, if blurring, flickering, or bars appear on the screen, proceed to adjust the Phase. To remove flickering or blurring (Phase): 1. Press one of the three buttons on the right side of the monitor to activate the buttons. 2. Press the Menu button on the right side of the monitor to open the OSD, and then select Image Control > Clock and Phase > Phase. 3. Press the + (Plus) or - (Minus) buttons on the right side of the monitor to eliminate flickering or blurring. Flicking or blurring may not be eliminated depending on your computer or graphics controller card installed. To correct screen position (Horizontal Position or Vertical Position): 28 Appendix B Support and troubleshooting

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Optimizing image performance (VGA analog input)
Two controls in the on-screen display can be adjusted to improve image performance: Clock and
Phase (available in the OSD menu).
NOTE:
The Clock and Phase controls are adjustable only when using an analog (VGA) input. These
controls are not adjustable for digital inputs.
The Clock must first be set correctly since the Phase settings are dependent on the main Clock
setting. Use these controls only when the auto-adjustment function does not provide a satisfactory
image.
●
Clock
—Increases/decreases the value to minimize any vertical bars or stripes visible on the
screen background.
●
Phase
—Increases/decreases the value to minimize video flickering or blurring.
NOTE:
When using the controls, you will obtain the best results by using the auto-adjustment
pattern software utility provided on the disc.
When adjusting the Clock and Phase values, if the monitor images become distorted, continue
adjusting the values until the distortion disappears. To restore the factory settings, press the
Menu
button and select
Management
>
Factory Reset
>
Yes
in the OSD.
To eliminate vertical bars (Clock):
1.
Press one of the three buttons on the right side of the monitor to activate the buttons.
2.
Press the
Menu
button on the right side of the monitor to open the OSD, and then select
Image
Control
>
Clock and Phase
>
Clock
.
3.
Press the
+
(Plus) or
–
(Minus) buttons on the right side of the monitor to eliminate vertical bars.
Press the buttons slowly so that you do not miss the optimum adjustment point.
4.
After adjusting the Clock, if blurring, flickering, or bars appear on the screen, proceed to adjust
the Phase.
To remove flickering or blurring (Phase):
1.
Press one of the three buttons on the right side of the monitor to activate the buttons.
2.
Press the
Menu
button on the right side of the monitor to open the OSD, and then select
Image
Control
>
Clock and Phase
>
Phase
.
3.
Press the
+
(Plus) or
–
(Minus) buttons on the right side of the monitor to eliminate flickering or
blurring. Flicking or blurring may not be eliminated depending on your computer or graphics
controller card installed.
To correct screen position (Horizontal Position or Vertical Position):
28
Appendix B
Support and troubleshooting