23
T
roub
leshooting
No display after powering on
The power has not been
turned off, but after a cer-
tain period of time, there is
no display
When the battery pack is
used, the screen is darker
than when the AC adaptor
is connected
The cursor cannot be con-
trolled properly
An afterimage appears (e.g.,
green, red, and blue dots
remain on the display) or
there are dots not display-
ing the correct colors
The screen becomes disor-
dered
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
Fn
+
F3
.
If you want to switch the display destination repeatedly by pressing
Fn
+
F3
,
make sure that the display destination has switched completely each time before
pressing
Fn
+
F3
again.
When displaying only through an external display, if the computer is shut down by
using the standby or hibernation function, there will be no display on the LCD unless
the external display is connected when 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 the standby or hiberna-
tion mode. (
“Computing on the Road”) Press the power switch.
Press
Fn
+
F2
and adjust the brightness. Note, however, that when the brightness is
increased, the battery running time will become shorter.
Brightness can be set to separate levels for when the AC adaptor is connected and when it is
disconnected.
If you are using an external mouse, ensure that the external mouse has been connected correctly.
Restart the computer by using the keyboard (Press ,
U
, and select [Restart] with
, then press
Enter
).
If the computer does not respond to keyboard commands, read “No response” (
page 25).
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 liq-
uid 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.
Changing the number of colors of the display may affect the screen. Restart the computer.
Windows XP
When using Dualview, use the same display colors for the external display as those used
by the LCD.
When using Dualview, do not press
Fn
+
F3
.
Restart your computer immediately after enabling or disabling Dualview.
Display
When the previous item is
not the cause
Press
F9
in the Setup Utility (
page 21). This will restore the Setup Utility’s
settings to their default values (except the password settings).
Try removing all peripheral devices.
Check a disk error using the following procedure.
1
Display [Local Disk (C:) Properties].
Windows 2000
Select [Local Disk(C:)] with the right button in [My Computer], and select [Properties].
Windows XP
Select [Local Disk(C:)] with the right button in [start] - [My Computer], and select [Properties].
2
Select [Tools] - [Check Now].
3
Select [Start] after selecting required items in [Check disk options].
At startup, hold down
F8
when [Panasonic] boot screen disappears, and release your
finger when the Windows Advanced Option Menu is displayed. Start the computer in
Safe Mode, and confirm the details of the error.
Starting Up (continued)
Summary of Contents for Touchbook CF-50 Series
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