HP Ew2400 - JetDirect Print Server

ENWW Troubleshooting the HP Jetdirect Print Server 187
Note When you attempt to reset to factory default values,
print a Jetdirect configuration page to confirm that
factory-reset values have been assigned.
● HP Jetdirect External Print Servers
Reset the HP Jetdirect external print server by holding down the
Test button on the print server while connecting the power cord.
After a cold reset, your network systems may lose their connection
to the printer.