HP Printer Trickery

Found out how to do it via command line Telnet

Telnet IP Address of printer 9100
( example, telnet 10.1.0.254 9100 )

It will say Connecting....
Now hit enter, and it'll just go to the top of the page, and it looks like its fucked up but it's not.

Now, if you type anything and then X out of the telnet box, it will print whatever you typed...

So, Telnet Ip Address 9100
Hey there Mr. Anderson
*X out*

Hey there Mr. Anderson will print out

now to change the LCD display, once you have telnetted in through port 9100, type this:

@PJL RDYMSG DISPLAY="Whatever you want it to say"

Then X out of the box, and Boo-Ya it changes..

Also, on HP LaserJet 4050 printers, you can FTP in and whatever you upload, it prints.

Another Plus, The default administrative user/password is

Administrator/password

So you could go:

FTP ip addresss
Use: Administrator
Password: Password

and bam you got admin priveledges... though not sure exactly what you can do with them on a printer lol..