Changing ip address on printer

We have a network printer that accidentally had its ip address changed to one outside our address subnet range. Now I cannot access it through telnet session in order to change it back. The reason I cannot change it on the front panel is the displayhas partially burned out and the right side is not viewable. Therefore you cannot see if the ip you are entering is what you believe it to be. To make matters worse the circuit board for this printer is no longer avaiable. It is an HP laserjet 4. Anyone have any suggestions?