Panasonic Toughbook CF-U1AQB11AM Operating Instructions Manual page 42

Troubleshooting (Basic)
Shutting down
Windows does not
shut down.
Display
No display.
The screen is dark.
The LCD brightness
changes a number
of times when the
AC adaptor is dis-
connected.
42
Remove the USB device.
Wait one or two minutes. It is not a malfunction.
The external display is selected. Press
to switch the display. Wait until the display has been
switched completely before pressing
again.
When using an external display,
Check the cable connection.
Turn on the display.
Check the settings of external display.
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 sleep (
( ) or hibernation by the power-saving
function. To resume, press the power switch.
The screen may not be displayed even after the com-
puter resumed from standby or hibernation. In this
case, press +
the computer again.
The screen is darker when the AC adaptor is not con-
nected. Press +
As you increase the brightness, battery consumption
increases.
You can separately set the brightness for when the AC
adaptor is connected and when not connected.
Intel(R) Display Power Saving Technology is active and
automatically changes the LCD brightness. This is not
a malfunction.
.
( ) to enter standby and resume
( ) and adjust the brightness.
+ ( )
+ ( )
) / standby