Panasonic Toughbook C1 Operating Instructions Manual page 30

Troubleshooting (Basic)
Password
Even after entering the pass-
word, a message appears
requesting to type it again.
Cannot log on to Windows.
("The user name or pass-
word is incorrect." is dis-
played.)
Display
The screen becomes black
for a moment.
No display.
The screen is disordered.
The external display does
not work normally.
30
NumLk
If lights up, press
Caps Lock
If lights up, press
The user name (account name) includes the "@" mark.
If another user account name exists:
Log on to Windows using another user account name, and delete the account name that
includes "@". Then create a new account name.
If no other account name exists:
You need to reinstall Windows (
When you set [Intel(R) video driver power saving function] - [Intel(R) Display Power
Saving Technology] of Power Plan Extension Utility to [Enabled], if you do the following
operations, the screen becomes black for a moment, but this is not a malfunction.
You can use it.
Adjust the brightness of the screen with
Remove and insert the AC adaptor.
While you are using motion video playback software, benchmark software for graphic, if er-
ror screen is displayed or application software does not function normally, set [Intel(R) video
driver power saving function] - [Intel(R) Display Power Saving Technology] to [Disabled].
When you set [Intel video driver power saving function (Intel(R) Display Power Saving
Technology)] of Power Saving Utility to [Enable], if you do the following operations, the
screen becomes black for a moment, but this is not a malfunction. You can use it.
Adjust the brightness of the screen with
Remove and insert the AC adaptor.
While you are using motion video playback software, benchmark software for graphic, if
error screen is displayed or application software does not function normally, set [Intel video
driver power saving function (Intel(R) Display Power Saving Technology)] to [Disable].
The external display is selected. Press
display. Wait until the display has been switched completely before pressing
P ) again.
+
The display is turned off by the power-saving function. To resume, do not press the
direct selection keys, but press any other key like
The computer entered
the power-saving function. To resume, slide the power switch.
The screen may become darker. Press
Changing the number of display colors and resolution may affect the screen. Restart the
computer.
The refresh rate of the internal LCD may be 40 hertz. Change the refresh rate of the
internal LCD.
A Right-click on the desktop, and click [Graphics Properties].
B Click [General Settings].
C If [Refresh Rate] of the Notebook is [40 Hz], change to [60 Hz] and click [OK].
If the external display does not support the power saving function, it may not work nor-
mally when the computer enters the power saving mode. Turn off the external display.
to disable the ten-key mode, and then input.
to disable the Caps Lock mode, and then input.
page 26).
Fn F1 Fn
+ / +
Fn F1 Fn
+ / +
Fn + F3 (or
Ctrl
.
sleep/
Fn F2
+ to make the screen brighter.
F2
.
F2
.
P ) to switch the
+
Fn F3
+ (or
standby or hibernation by