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9-18 User’s Manual
L450/L450D
LAN
No display Try adjusting the contrast and brightness controls
on the external monitor.
Press the FN + F5 hot key in order to change the
display priority and ensure that it is not set for the
internal display panel only.
Check to see if the external monitor is connected.
When the external monitor is set as the primary
display device in extended desktop mode, it will
not display when the computer wakes up from
Sleep Mode if the external monitor has been
disconnected while in Sleep Mode.
To keep this from happening, do not disconnect
the external monitor while the computer is in
Sleep or Hibernation Mode.
Remember to turn off the computer before
disconnecting the external monitor.
When the display panel and an external monitor
are set to clone mode and the monitors are
turned off by the timer, the display panel or the
external monitor may not display when turned on
again.
If this occurs, press FN + F5 to re-set the display
panel and external monitor to clone mode.
Display error occurs Check that the cable connecting the external
monitor to the computer is firmly attached.
If you are still unable to resolve the problem,
contact your reseller, dealer or service provider.
Problem Procedure
Problem Procedure
Cannot access LAN Check for a firm cable connection between the
LAN jack and the LAN HUB.
Wake-up on LAN does
not work
Make sure the AC adaptor is connected. The
Wake-up on LAN function consumes power even
when the system is off.
If problems persist, consult your LAN
administrator.