Panasonic Toughbook CF-F9KWH011M Reference Manual page 168

Troubleshooting (Advanced)
The LCD brightness changes a number of times when the AC adaptor is
disconnected
Intel(R) video driver power saving function (Intel(R) Display Power Saving Technology) is active and automatically
changes the LCD brightness.
Image colors are not reproduced as expected when displaying photographs or
other images
We recommend disabling the [Intel(R) video driver power saving function (Intel(R) Display Power Saving Technology)].
Nothing appears on the external display, or the display is not correct
Check that the external display cables are correctly connected.
Check that the external display is turned on.
Check that the external display settings are correct.
When an external display not compatible with the power-saving mode is used with the computer, the display may not
function correctly when the computer enters the power-saving mode. In this case, turn on the external display again.
However, in the case of some external displays, the screen display may be distorted or the mouse cursor may not be
properly displayed depending on the settings. In this case, try setting the number of colors, screen area (resolution), and
refresh rate to smaller values.
Takes long time to display the [Power Option] screen
Windows 7
Perform the following steps to confirm whether the number of Power Plan Extension Utility configurations created when
using Power Saving Utility has reached 100 or more.
Click or
A
When more than one power plan is displayed, click [Change plan settings] for the power plan you want to delete and click
[Delete this plan].
The [Panasonic] boot screen is not displayed on the external display
As soon as the computer starts up, press F2 or Del several times and start the Setup Utility.
and then click [More power options].
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