Panasonic CF-T7 Series Reference Manual page 82

Troubleshooting (Advanced)
For details of the mouse driver, consult the mouse manufacturer.
(In some cases, later versions may be available.)
If operation is not correct even after installing the driver, set [Touch Pad] to [Disable] in the [Main] menu of the Setup Util-
ity. ( page 67)
Problems with Display
Screen is too dark or too bright
Press Fn+F2 (becomes brighter) or Fn+F1 (becomes darker).
If the screen becomes darker after disconnecting the AC adaptor:
The computer has different set brightness levels for when the AC adaptor is connected and for when it is not connected.
Based on the settings in the default setting, the screen will become darker when the AC adaptor is removed. If you press
Fn+F2 to increase the brightness when the AC adaptor is not connected, this brightness is maintained, and determines
the brightness next time the AC adaptor is disconnected.
(Making the display brighter shortens the battery operating time.)
There are red, green, or blue dots on the screen, or display defects (always-on
pixels or always-off pixels)
This is not a malfunction.
High-precision and advanced technologies are necessary for 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), this is not considered a defect.
Nothing is displayed on the screen
Check if the power-saving mode is active.
• If the power indicator is lit:
The display is turned off. Press a key with no independent effect, such as Ctrl or Shift.
Do not use a key that may make a selection (Enter, Space, Esc, Y, N, numeric keys, and so on).
• If the power indicator is blinking or is not lit:
The sleep or hibernation is entered. Slide the power switch.
Disconnect the external display before checking a disk error (
ing software. If you run this software with the external display still connected, in some cases, nothing will be displayed on
the screen. If this occurs, wait until the process is complete and the screen display returns.
page 76) or before using commercially available partition-
82