Auto Duplex Unit Not Working Model: HP LaserJet 2420dn I am using Windows XP and installed "HP LaserJet 2420 PCL 5e" driver. It is connected via internet and when I try to print double side, it only allows me to manually print on both sides even though my printer has an automatic duplex unit. The duplex unit works fine with my linux machine but Windows do not allow me to print both sides. Any suggestions? Thank you!

Go to "Devices and printer" and right click on the 1320, go down to "printer properties" and click. When the new box opens click on "device settings" tab and scroll down to installable option and find Duplex unit. Be sure it is set to installed, if not set it. Now your printer should duplex again.

According to the specs, this printer does not have a duplex unit and therefore cannot print double sided prints.
DOUBLE SIDED PRINTING USING A SINGLE SIDED PRINTER
If your printer does not have a duplex unit then the printercannot print double sided pages automatically.
You can print double sided pages but you have to do it one page at a time.
First print Page 1 then place the page back into the paper tray, but turn thepage upside down and the print Page 2.
Then print page 3 on one side then page 4 on the other side and repeat for therest of the document.
I suggest you try a test page first, to get the printing the right way up onboth sides of the page so it reads correctly.

Why don't you delete the printer and go out to www.hp.com/#support and download the latest drivers.
Try the PCL5, less problems. and reinstall the printer.

Try Using the HP Print Diagnostic Utility in Windows - HP Customer Care (United States - English)

The only way to duplex print on a standard 2420 is to print the first page, then take that page and re-insert it into the paper tray face up. Then print page 2 onto the back of page 1. If you want to automatically duplex print then you need a 2420DN printer which has the duplexing paper path as well as the formatter board with the duplex firmware.
Good Luck and Thank You for using Fixya.

There is no driver for win 7, although if you are running on windows 7 32bit there is a work around. Download the software for windows vista 32 bit for the 2840.

Hi,

Uninstall the current drivers, install UPD PCL 5, and upgrade the firmware of the printer.

Driver for OS:
Operating System(s): Microsoft Windows Server 2003, Microsoft Windows Server 2008 W32, Microsoft Windows Vista, Microsoft Windows XP
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=18972&prodSeriesId=416419&prodNameId=412142&swEnvOID=228&swLang=8&mode=2&taskId=135&swItem=ja-35999-16


Firmware sw link:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=18972&prodSeriesId=416419&prodNameId=412142&swEnvOID=54&swLang=8&mode=2&taskId=135&swItem=lj-25074-6

Hi kakurawat: Do you meet these minimum system requirements? Minimum system requirements ● Windows® 2000 ● Windows XP ● Windows Millennium Edition (Me) ● Windows Server 2000 ● Windows 98 ● Mac OS X V10.3 and later ● 128 MB RAM for Windows operating systems ● 32 MB RAM for Macintosh operating systems ● 250 MB hard-disk space (full installation) ● CD-ROM drive ● USB port Printer drivers The all-in-one comes with software that allows the computer to communicate with the all-in-one (by using a printer language). This software is called a printer driver. Printer drivers provide access to allin- one features, such as printing on custom-sized paper, resizing documents, and inserting watermarks. Supported printer drivers The following printer drivers are provided for the all-in-one. If the printer driver that you want is not on the all-in-one CD or is not available on www.hp.com, contact the manufacturer or distributor of the program that you are using, and request a driver for the all-in-one. NOTE The most recent drivers are available at www.hp.com. Depending on the configuration of Windows-based computers, the installation program for the all-in-one software automatically checks the computer for Internet access in order to obtain the latest drivers. Operating system1 Fax driver PCL 6 printer driver PCL 5 printer driver PS printer driver PPD2 printer driver Microsoft® Windows® 98 Windows Millennium Edition (Me) Windows 2000 Windows XP Windows Server 2003 Mac OS X V10.3 and Mac OS X V10.4 1 Not all all-in-one features are available from all drivers or operating systems. See the context-sensitive help in the printer driver for available features. 2 A Macintosh printer driver and the necessary PostScript (PS) Printer Description files (PPDs) are included with the all-in-one. Additional drivers The following drivers are not included on the CD, but are available from the Internet. ● UNIX® model scripts ● Linux drivers ● Windows XP 64-bit drivers You can obtain Model Scripts for UNIX and Linux by downloading them from the Internet or by requesting them from an HP-authorized service or support provider. For Linux support see www.hp.com/go/linux. For UNIX support see www.hp.com/go/jetdirectunix_software. Typical installation The following software is included with a typical installation: ● HP ToolboxFX ● HP LaserJet Fax setup utility ● HP LaserJet Scan program and driver ● HP LaserJet Fax ● Readiris OCR (not installed with other software; separate installation is required) ● Printer drivers (PCL 6, PCL 5e, PostScript® Level 2 emulation [PS]) ● HP Director (Macintosh) ● HP All-in-One Setup Assistant (Macintosh) Minimum installation The following software is included with a minimum installation: ● PCL 6 printer driver ● HP LaserJet Scan program and driver ● HP LaserJet Fax setup utility NOTE Minimum installation supports faxing from the control panel. Hope this helps

Hi,

I had the same problem. It was due to incorrect properties in the printer settings.

1. Go to Start >> Printers and Faxes
2. Right-click on the HP 2420 printer and select Properties.
3. Go to the Device Settings tab.
4. Under Installable Options, set Duplex Unit to Installed.

Also, make sure that the Printing Preferences are set to Two Sided Printing:

1. Go to Start >> Printers and Faxes
2. Right-click on the HP 2420 printer and select Printing Preferences.
3. Go to the Printing Shortcuts tab.
4. Select the Two Sided (Duplex) Printing option.

That should do the trick.

HP - please change your setup so that this is set by default!!

Brian Z

I think that Odyssey user is right it maybe that the print driver is not compatible with the program you are using goto hp.com or hp.co.uk and download the PCL 5e driver

Hope this helps you
Thanks J