Sharp UX-B800SE ユーザーズマニュアル

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Check the Ethernet cable. Are the 
connections secure? Are you using 
straight-through (not crossover) cable 
for 10Base-T/100Base-TX?

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There may be a problem in the router 
or other device to which the machine 
is connected. Try removing and then 
restoring the power to the router (see 
the manual for the router).

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If [IP ADDRESS/DHCP: FAIL] 
appears, remove and then reinsert 
the Ethernet cable plug, and repeat 
Steps 1 to 3 above. If the same 
message appears, check the device 
that acts as the DHCP server on your 
network (try removing and restoring 
the power). If your router is your 
DHCP server, make sure that DHCP 
is enabled in the router settings. If 
your network does not have a DHCP 
server, set a static IP address as 
explained on page 23.

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If a static IP address has been set, 
make sure that the network settings 
(page 23) are correct .