The elapsed time for an update depends on the I/O transfer time, as well as the time that it takes for the
device to reinitialize. The I/O transfer time depends on a number of things, including the speed of the
host computer that is sending the update and the I/O method (network). The reinitialization time depends
on the specific hardware configuration of the device, such as the number of EIO devices installed, the
presence of external paper-handling devices, and the amount of memory that is installed.
Finally, any print jobs that are ahead of the RFU job in the queue are printed before the update is
processed.
Use one of the methods described in this manual to update the device firmware.
Printer messages during the firmware update
The following table lists the causes and results of possible interruptions to the firmware update.
Table 7-2 Troubleshooting a firmware update
Cause Result
The job was cancelled from the control panel. No update has occurred.
A break in the I/O stream occurred during send (for example,
the network cable was removed).
No update has occurred.
A power cycle occurred during the RECEIVING UPGRADE
process.
No update has occurred.
A power cycle occurred during the PERFORMING
UPGRADE process.
No update has occurred. Resend the update through a USB
port.
A power cycle occurred during the INITIALIZING process. The update has been completed.
Print jobs that are sent to the device while an update is in process do not interrupt the update.
All HP LaserJet devices leave the factory with the most recent firmware version installed. If a remote
firmware update fails for the component, the .RFU file must be resent. The only component exception
is the formatter. See
Table 7-3 Update messages for information regarding a formatter update error.
Because a firmware update cannot be resent over a USB for Mac, contact an HP Customer Care Center
if a remote update fails in a Macintosh operating system.
Three messages appear during a normal update process; others appear only if the update process does
not succeed.
Table 7-3 Update messages
Device message Explanation
RECEIVING UPGRADE This message appears from the time the device recognizes the beginning of
an .RFU update until the time the device has verified the validity and integrity of
the .RFU update.
NOTE If the remote firmware update process is interrupted before the
firmware is downloaded (while RECEIVING UPGRADE appears on the
control-panel display), the firmware file must be sent again. No message
appears on the device control panel to indicate that the update was
interrupted.
PERFORMING UPGRADE This message appears while the device is actually reprogramming the firmware.
ENWW Remote firmware updates 283
Engineering Details
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