HP RP7 Maintenance & Service Guide HP RP7 Retail System Model 7800 - Page 156

ImageControl/ Horizontal Position, System Tools

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Blank screen and the power LED flashes red seven times, once every second, followed by a two second pause, and the computer beeps seven times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution System board failure (ROM detected failure prior to video). Replace the system board. Blurry video or requested resolution cannot be set. Cause The correct graphics drivers may not be loaded. Graphics card is bad. Solution Update graphics drivers. Replace the graphics card. Image is not centered. Cause Position may need adjustment. Solution Press the display's Menu button to access the OSD menu. Select ImageControl/ Horizontal Position or Vertical Position to adjust the horizontal or vertical position of the image. "Out of Range" displays on screen. Cause Video resolution and refresh rate are set higher than what the monitor supports. Solution Restart the computer and enter Safe Mode. Change the settings to a supported setting then restart the computer so that the new settings take effect. Fuzzy focus; streaking, ghosting, or shadowing effects; horizontal scrolling lines; faint vertical bars; or unable to center the picture on the screen (flat panel monitors using an analog VGA input connection only). Cause Solution The correct graphics drivers may not be loaded. 1. Update the graphics driver. Certain typed symbols do not appear correct. Cause The font you are using does not support that particular symbol. Solution Use the Character Map to locate and select the appropriate symbol. Click Start > All Programs > Accessories > System Tools > Character Map. You can copy the symbol from the Character Map into a document. 146 Appendix F Troubleshooting Without Diagnostics

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Blank screen and the power LED flashes red seven times, once every second, followed by a two second pause, and
the computer beeps seven times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause
Solution
System board failure (ROM detected failure prior to video).
Replace the system board.
Blurry video or requested resolution cannot be set.
Cause
Solution
The correct graphics drivers may not be loaded.
Update graphics drivers.
Graphics card is bad.
Replace the graphics card.
Image is not centered.
Cause
Solution
Position may need adjustment.
Press the display's Menu button to access the OSD menu.
Select
ImageControl/ Horizontal Position
or
Vertical
Position
to adjust the horizontal or vertical position of the
image.
“Out of Range” displays on screen.
Cause
Solution
Video resolution and refresh rate are set higher than what
the monitor supports.
Restart the computer and enter Safe Mode. Change the
settings to a supported setting then restart the computer so
that the new settings take effect.
Fuzzy focus; streaking, ghosting, or shadowing effects; horizontal scrolling lines; faint vertical bars; or unable to
center the picture on the screen (flat panel monitors using an analog VGA input connection only).
Cause
Solution
The correct graphics drivers may not be loaded.
1.
Update the graphics driver.
Certain typed symbols do not appear correct.
Cause
Solution
The font you are using does not support that particular
symbol.
Use the Character Map to locate and select the appropriate
symbol. Click
Start
>
All Programs
>
Accessories
>
System Tools
>
Character Map
. You can copy the symbol
from the Character Map into a document.
146
Appendix F
Troubleshooting Without Diagnostics