How to set up printer to print double sided. Printer Xerox Phaser 8400

I've seen this issue on some of my other Xerox machines (not the 8400 specifically). 9 times out of 10 the solution is to update both the printer driver to the newest version, as well as updating Adobe Reader to the newest version.

Here are the links to each:

Xerox Phaser Drivers
Adobe Reader

Xerox Phaser 8400 does not support double sided prints. You have to have a Duplex Unit for Phaser 8400 part number 097S03177 to be able to print double sided. If you have the duplex unit, on the Print dialog box just click Preferences and under 2-Sided Printing select 2-Sided Print then Apply.

maybe is defective board. send to repair.

That is a problem with print head movement. Either side to side or tilt. There is a stainless steel print head block located on the left side of the frame, about 2/3 of the way back and near the bottom, It may be contaminated with ink. Or the print head wiper may be tacked to the print head. If you want info how ot access and repair, let me know.

The print head is not moving freely.
There is s print head block that may be filled up with runoff ink, or the print head wiper blade may be tacked to the print head.

That is a print head tilt error. Either the print head pivot block is contaminated with ink or the wiper blade is tacked to the print head.
Let me know if you want to try to resolve it yourself, I will send you directions.

The manual bypass tray on the Phaser 8400 can be set only when you have paper in the tray.

The envelope will read in the set up when you have it in the tray.

An 8400 prints with a USB or a cat 5 cable ( ethernet, regular internet cable). You can not print to a Phaser 8400 with a parallel cable. I really can't figure why you would get that message.You enter the network settgings and set an IP address, then configure your print driver to match.
There is no parallel port on a 8400.

Not a problem

The first obvious question is, "Does it have blue ink/wax?" Is it displaying any errors? Have you tried the Xerox support site? They have a fantastic utility that can connect to your printer and diagnose many problems. Here's the URL for the utility: http://www.phasersmart.com/ They also have a wealth of information in their knowledge base. Here's the URL for the support page for the Phaser 8400: http://www.office.xerox.com/printers/color-printers/phaser-8400/sprt-enus.html Did anything happen before the blue quit printing? Have you tried running a cleaning cycle?