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User’s Manual 6-14
NB500/NB505/NB520/NB525/NB550D/NB555D Series
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 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 they 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.