29
T
roubleshooting
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 re-
main on the display) or there
are dots not displaying 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.
The display destination may be set to the external display.
Try changing the display destination 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.
Press
Fn
+
F2
and adjust the brightness.
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 mode (power
indicator blinks green) or hibernation mode (power indicator turns off). In such cases,
slide 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 32).
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 function-
ing properly), no defect is considered to exist.
Changing the number of colors or resolution of the display may affect the screen. Restart
the computer.
Display
When the previous item is
not the cause
Press
F9
in the Setup Utility (
“Setup Utility”). 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].
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*
1
, 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.
*
1
When [Password on boot] is set to [Enable], [Enter Password] appears after the [Panasonic]
boot screen disappears. Hold down
F8
soon after inputting the password and pressing
Enter
.
Starting Up (continued)
Summary of Contents for Toughbook CF-T2DWATZKM
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