Compaq 12XL510 Models XL300, XL300A, and XL300B - Maintenance & Service Gu - Page 63

Solving Display Problems, Problem, Probable Cause, Solutions, Fn+F7, LCD or CRT.

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Presario 1200XL Series Model XL300, XL300A, and XL300B Solving Display Problems Problem Probable Cause Solution(s) Screen is dim. Brightness Control (if available) is not set properly. Adjust the brightness of the display by pressing Fn+F7 or Fn+F8. Computer screen is in direct Tilt display or move computer. light. Screen is blank. Screen save was initiated by Power Management due to lack of user activity. Display has overheated. Press any key or touch the TouchPad. If the Notebook is in direct sunlight, move it and allow it to cool off. Display is blank and the Suspend icon is flashing. System is in Suspend mode. Press any key or touch the TouchPad. Internal display is blank but the screen on an external monitor displays information. Internal display flashes or has garbled characters when the Notebook is connected to an external monitor. Display function was switched to an external monitor. Using 1024 x 768 or higher resolution on external monitor and toggling back to internal display, which supports up to 800 x 600. Press Fn+F3 to switch between LCD or CRT. Restart the Notebook. The light tubes on the edge of the display panel do not light up at all and the PowerOn Self-Test (POST) completes when the unit is powered up.* Improper backlight or display cable connections. Replace the display assembly. Defective inverter board. Replace the display assembly. Defective display cable. Replace the display assembly. Defective display panel. Replace the display assembly. Defective system board. Replace the system board. 26 TROUBLESHOOTING PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1200XL SERIES

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26 T
ROUBLESHOOTING
P
RESARIO
N
OTEBOOK
M
AINTENANCE
AND
S
ERVICE
G
UIDE
1200XL S
ERIES
Presario 1200XL Series
Model XL300, XL300A, and XL300B
Solving Display Problems
Problem
Probable Cause
Solution(s)
Screen is dim.
Brightness Control
(if available) is not set
properly.
Adjust the brightness of the
display by pressing
Fn+F7
or
Fn+F8
.
Computer screen is in direct
light.
Tilt display or move computer.
Screen is blank.
Screen save was initiated by
Power Management due to
lack of user activity.
Press any key or touch the
TouchPad.
Display has overheated.
If the Notebook is in direct
sunlight, move it and allow it to
cool off.
Display is blank and
the Suspend icon is
flashing.
System is in Suspend mode.
Press any key or touch the
TouchPad.
Internal display is
blank but the screen
on an external monitor
displays information.
Display function was switched
to an external monitor.
Press
Fn+F3
to switch between
LCD or CRT.
Internal display
flashes or has garbled
characters when the
Notebook is connected
to an external monitor.
Using 1024 x 768 or higher
resolution on external monitor
and toggling back to internal
display, which supports up to
800 x 600.
Restart the Notebook.
The light tubes on the
edge of the display
panel do not light up
at all and the Power-
On Self-Test (POST)
completes when the
unit is powered up.*
Improper backlight or display
cable connections.
Replace the display assembly.
Defective inverter board.
Replace the display assembly.
Defective display cable.
Replace the display assembly.
Defective display panel.
Replace the display assembly.
Defective system board.
Replace the system board.