Brother HL-4000CN Network User's Manual page 70

3. If you cannot make any of the connections in step 2, check the following:
a. Make sure the printer is powered on and on-line.
b. Verify the cabling, network connection, referring to printer
configuration page and make sure that the "Ethernet Mode" is not set to
"unknown". If the "Ethernet Mode" is set to "unknown", printer cable
may not be connected to the printer.
c. Check to see if there is any LED activity.
NC-3100s has two LEDs.
•
Green LED
This LED is on if there is a valid connection to the network 100BaseTX.
•
Orange LED
This LED will be on or blink if the print server is connected to a
10BaseT or 100BaseTX network.
4. If you are using a repeater or hub, make sure that SQE (heartbeat) is turned
off at the hub. Also, if you have a hub or multi-port repeater, verify that the
hub or repeater port is good by trying the print server on a different port or
on the other hub or multi-port repeater.
5. If you have a bridge or router located between the print server and host
computer, make sure that the device is set up to allow the print server to
send and receive data from the host. For example, a bridge can be set up to
only allow certain types of Ethernet addresses to pass through (a process
known as filtering); therefore, such a bridge must be configured to allow
print server addresses. Likewise, a router can be set up to pass only certain
protocols, so be sure that the desired protocol can be passed through to the
print server.
6. If the job exits the queue but does not print, make sure that you are not
trying to print a text job to a PostScript printer. If you have a printer that is
capable of automatic language switching, make sure that the printer is not
forced into PostScript mode.
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