Panasonic Toughbook CF-72V3JUZQM Operating Instructions Manual

Also see for ToughBook CF-72 Series: Supplementary instructions Reference manual Operating instructions Operating instructions Operating instructions

Contents

22 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 (e.g.,green, red, and blue dotsremain on the display) orthere are dots not display-ing the correct colorsThe external display nolonger displays properlyThe screen becomes disor-deredAfter the display destinationof the screen is switched withFn + F3 , the display des-tination returns to both theinternal LCD and externaldisplay upon operationDealing with Problems (Summary)When 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 .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 or press Fn + F3 .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 Ctrl .To save power, your computer may have automatically entered either the standby orhibernation mode ( “Computing on the Road”). Slide the power switch.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 such cases,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.Under the condition that the [MS-DOS Prompt]* screen is set to “Full Screen”, the displaydestination returns to both the internal LCD and external display if “EXIT” is input and the[MS-DOS Prompt]* screen is closed, or “Full Screen” is canceled (e.g., Alt + Enter ),when the display destination of the screen is switched with Fn + F3 .Press Fn + F3 again.* Windows 2000 Windows NT :[Command Prompt]Display