Eio Error

Jetdirect is HP's term for network card

These are all just suggestions for troubleshooting in no particular order.

You have what HP calls an "internal" jetdirect, which plugs in to a slot on the back of the printer. EIO 1 is the slot it's plugged in to and is the EIO 1 portion of the error. If you look at the back of the printer, you'll see that stamped in to the metal next to the slot. You also have an EIO 2 slot, probably covered by a metal plate held on by a couple of screws. As frprinterwiz said, you can try moving the jetdirect to that slot. If it stil doesn't work, that portion of the error should change to EIO 2. That would indicate a bad jetdirect or a more serious problem in the printer hardware.

If you do the cold reset, that will restore everything to factory defaults, so print a configuration page before you do it so you'll have a record of the settings. I do agree that's worth doing if changing the EIO slots doesn't work.

The model number for the jetdirect wil be printed on the portion of the card that sticks out of the printer. The model that should have come with your printer is either a 620n or a 625n or (I think) a 635n.

Since things get swapped around after purchase sometimes though by end users or printer techs, check that model number and see what it is. If it happens to be a model 615n, then that's probably the problem. The 615n was prone to failure (many, many failed), and HP was replacing them with new 620n cards for a few years. That policy ended 10/31/08 though.

If you have another printer with an internal jetdirect in the office, try swapping the jetdirects between the printers, and see if you're 9000 comes to ready. If so, then it's the jetdirect that's bad.

This may be of some help:

http://h20565.www2.hp.com/hpsc/doc/public/display?docId=emr_na-bpj05423