Panasonic CF-48 Series Operating Instructions Manual

Also see for Toughbook CF-48 Series: Reference manual Operating instructions Reference manual Service manual Reference manual

Contents

23 TroubleshootingNo display after poweringonThe power has not beenturned off, but after a cer-tain period of time, there isno displayThe cursor cannot be con-trolledAn afterimage appears (i.e.,green, red, and blue dotsremain on the display) orthere are dots not display-ing the correct colors.The external display nolonger displays properlyThe screen becomes disor-deredThe red indicator lights.Repeated beeping soundwhile the computer is in use.The red indicator blinksThe orange indicator blinksThe battery level is low. Save your data and power off your computer.After connecting the AC adaptor or replacing the battery pack with a fully charged one, turnyour computer on.The battery pack or recharging function may be defective. Quickly remove the batterypack and disconnect the AC adaptor, then connect them again.If the problem persists, contact Panasonic Technical Support.Unable to charge because of an improper temperature range. ( page 6)Battery IndicatorApplication SoftwarePress Ctrl + Alt + Del , select [Shut Down], and then press [OK].After shutting down by pressing the power switch for more than four seconds, press thepower switch to power on and open the application again.If the program no longer works normally, go to [Start] - [Settings] - [Control Panel] -[Add/Remove Programs] to delete the program. Then reinstall the program.Computer hangsWhen 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.Try changing the display by pressing Fn + F3 ( Windows 98 except when thecomputer is in the Dual-Display Mode).When displaying only through an external display, if the computer is shut down by usingthe standby or hibernation function, there will be no display on the LCD unless the exter-nal display is connected when operations are resumed. In this case, connect the externaldisplay.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 aselection, like the Shift key.To save power, your computer may have automatically entered the standby or hiberna-tion mode. ( “Computing On the Road”)Restart the computer by using the keyboard (e.g., ).If an image is displayed for a prolonged period of time, an afterimage may appear. Thisis 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 liquidcrystal displays (color LCDs). Therefore, if 0.002% or less of the picture elements eitherfail to light or remain constantly lit (that is, more than 99.998% of elements are function-ing properly), no defect is considered to exist.When an external display not compatible with the power saving mode is used with thecomputer, the external display may no longer display properly when the computer enters thecondition the power of the display is OFF (for energy conservation purposes). In suchcases, turn off the power to the external display.Changing the number of colors of the display may affect the screen. Restart the computer.Windows 98When using Dual-Display mode, use the same display colors for the external display asthose used by the LCD.Display