Hi,
Info taken from HP website
http://h20000.www2.hp.com/bizsupport/TechSupport/Doc...
HP LaserJet 4, 4 Plus, 4V, 4Si, and 5 series and HP Color LaserJet printers
To configure TCP/IP parameters from the control panel, use the following instructions:
Press MENU, repeatedly, until one of the following messages appears on the control panel:
HP LaserJet printer type Control panel message
HP LaserJet 4 and 4m printers: AUX IO MENU
HP LaserJet 4 Plus, 4m Plus, 4v, 4mv: MIO MENU
HP LaserJet 5/5n/5m and the original Color LaserJet: HP MIO MENU
HP LaserJet 4Si/4Si MX: MIO MENU 1 or MIO MENU 2
Press ITEM . CFG NETWORK=NO* will appear.
Press the PLUS button once. CFG NETWORK=YES* will appear.
Press ENTER or SELECT .
Press ITEM repeatedly until CFG TCP/IP=NO* appears.
Press the PLUS button. CFG TCP/IP=YES* will appear.
Press ENTER or SELECT .
Press ITEM until BOOTP=YES* appears.
Press the PLUS button. BOOTP=NO will appear.
When using BootP or DHCP, keep the setting BOOTP=YES* .
The BootP or DHCP server will configure the TCP/IP parameters on the HP Jetdirect.
No other TCP/IP configuring is necessary.
Press ENTER or SELECT .
Press ITEM . IP BYTE 1 = (value) will appear.
Press the PLUS button until the value of the first byte of the IP address appears on the control-panel display. By pressing SHIFT and the PLUS button, the value will decrease.
Press ENTER or SELECT .
Press ITEM to continue. Repeat Steps 11-13 to configure the remaining bytes of the IP address.
Repeat Steps 11-13 to configure the subnet mask bytes (SM BYTE 1=), syslog server IP address (LG BYTE 1=), default gateway (GW BYTE 1=), and timeout (TIMEOUT=).
Press ONLINE . Print a self-test page to verify the IP settings.
If the test page does not show the correct settings, power cycle the printer and reprint the test page.
HTH