C9148-90909 4 Maintenance 41
Updating product firmware
Downloading a remote firmware update
The HP LaserJet 4100mfp product supports remote firmware updates (RFUs). The update is
downloaded from the website http://www.hp.com/go/lj4100_firmware (downloading a firmware
update is similar to downloading printing-system software and printer drivers).
This website also features an “E-mail me when new software is available” link. This feature
notifies you by e-mail when a new firmware update version is available for the MFP. If you used
HP WebReg to register your product, you are automatically sent an e-mail notification when a
new firmware update version is available for the MFP.
Hint The RFU file on the website is a self-extracting .EXE file. Detailed instructions about how to
download the RFU file can be found at the website http://www.hp.com/go/lj4100_firmware.
The RFU process consists of three steps:
● Determine the version of firmware currently installed (print a configuration page; see
“Configuration page” on page 130). Look for the version information in the device information
section of the configuration page.
● Go to the website http://www.hp.com/go/lj4100_firmware website and download the update.
● Install the update.
Note For more information about remote firmware updates, contact your HP Customer Care Center
and ask for a software technical reference sheet (see “Support” on page 144).
Installing the update
CAUTION If a firmware update involves a change in the format on nonvolatile random-access memory
(NVRAM), any user-set settings (for example, configure device settings) revert to default settings.
Before installing an updated version of the firmware, print any information pages required to reset
user defined settings. See “Evaluate the information pages” on page 130.
Note To install a firmware update on a computer using the UNIX operating system, use any method
that delivers the .RFU file to the printer. For example, $cp/home/yourmachine/FILENAME/dev/
parallel where /home/yourmachine/FILENAME with substitutions for the locations that contain the
location of the .RFU file.
RFU installation messages
During normal RFU installation the following three messages appear on the control-panel
display.
● Recieving Upgrade
• This message appears from the time the printer recognizes the beginning of a .RFU file
being sent until the time the printer verifies the validity and integrity of the .RFU file.
● Performing Upgrading For Help Press?
• This message appears while the printer is reprogramming the DIMM with the .RFU file
information.
● Wait For Printer To Reinitialize
• This message appears from the time the printer finishes reprogramming the DIMM until
the printer re-initializes.
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