Panasonic Toughbook CF-28 Series Reference Manual page 67

Dealing with Problems
Display
No display after powering
on
The power has not been
turned off, but after a cer-
tain period of time, there
is no display
The cursor cannot be con-
trolled
An afterimage appears
(e.g., green, red, and blue
dots remain on the dis-
play) or there are dots not
displaying the correct col-
ors
The external display no
longer displays properly
The screen becomes dis-
ordered
During simultaneous dis-
2
play* , the screen of the ex-
ternal display becomes
disordered
When the screensaver is
set, an error will occur dur-
ing a resume operation.
* 1 To display one screen using both the internal LCD and external display as an extended display:
Dual-Display = Extended Desktop in [Intel (R) 82830M Graphics Controller Properties]
Windows 2000
Windows NT
* 2 To display the same screen on both the internal LCD and external display:
Simultaneous display =
When there is no display to an external display,
• Check your cable connection to the external display.
• Confirm your display is powered on.
• Check the settings for your external display.
Try changing the display by pressing
Windows 98 The combination does not work when the computer is in the Dual-
Display*
When displaying only through an external display, if the computer is shut down
(including the standby or hibernation function), there will be no display on the LCD
unless the external display is connected when the computer is powered on or
operations are resumed. In this case, connect the external display or press
Fn + F3 .
Has the computer been set to the power-saving mode?
To resume operation of your computer from the condition the power of the display
is off (for energy conservation purposes), press any key unrelated to the direct
triggering of a selection, like Ctrl ..
To save power, your computer may have automatically entered either the standby
or hibernation mode. Rotate the power switch.
Windows NT
If the display turns off while using a serial mouse, press any key or touch the touch
pad/touchscreen to resume. Then set [Power Management Mode] to [Disable] in
the Setup Utility.
Restart the computer by using the keyboard (e.g.,
If an image is displayed for a prolonged period of time, an afterimage may appear.
This is not a malfunction. The afterimage will disappear when a different screen is
displayed.
High-precision and advanced technologies are necessary in the production of color
liquid crystal displays (color LCDs). Therefore, if 0.002% or less of the picture
elements either fail to light or remain constantly lit (that is, more than 99.998% of
elements are functioning properly), no defect is considered to exist.
When an external display not compatible with the power saving mode is used with
the computer, the external display may no longer display properly when the computer
enters the condition the power of the display is off (for energy conservation pur-
poses). In such cases, turn off the power to the external display.
Changing the number of colors of the display may affect the screen. Restart the
computer.
Windows 98
When using Dual-Display*
display as those used by the LCD.
Try changing the display by pressing
Windows 98 The combination does not work when the computer is in the Dual-
Display*
If you continue to experience problems, try changing the display in [Star t] - [Set-
tings] - [Control Panel] - [Intel
When the computer automatically enters the standby mode while the screensaver is
running, an error may occur during a resume operation. In such cases, turn off the
screensaver or try changing the pattern of the screensaver.
[Intel (R) 830M Graphics Controller Properties]
[Intel Corporation 830M Graphics Controller Hub Properties]
Intel (R) Dual Display clone in [Intel (R) 82830M Graphics Controller Properties]
Windows 2000 [Intel (R) 830M Graphics Controller Properties]
Windows NT [Intel Corporation 830M Graphics Controller Hub Properties]
(Advanced)
Fn + F3 .
1
Mode.
1
Mode, use the same display colors for the external
Fn + F3 .
1 Mode.
®
Graphics Technology].
).
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