HP LASERJET M-SERIES MFP’S, 49.4C02 AFTER FIRMWARE UPGRADE.
This error can
affect monochrome and color M-series multifunction printers. In some instances
after upgrading a LaserJet M-series MFP firmware upon rebooting the 49 error
will occur. As soon as the printer is connected to the network the error
appears. Disconnecting the printer from the network seems to prevent the error
from occurring after the upgrade. The problem seems to be with the Kerberos
Authentication feature. The file might get corrupted during the upgrade.
Kerberos is a secure method for authenticating a request for a service on a
network. It enables a user to request an
encrypted ticket from an authentication process that can be used to request a
particular service from a server. The user’s password does not have to pass
through the network.
The following
list shows some of the printer's and the firmware levels which might be affected
by upgrading the firmware.
PRINTER UPGRADING
FROM UPGRADING TO
M3027mfp, M3035mfp
20071211 48.051.1 or earlier
20080405 48.061.8 or later
M4345mfp 20071211 48.051.1 or
earlier 20080405 48.061.8 or later
M5025mfp 20071211 48.051.1 or earlier 20080405 48.061.8 or later
CM4730mfp
20071211 50.031.0 or earlier
20080405 50.041.8 or later
CM6030/6040mfp
20080118 50.003.0 or earlier
20080405 52.012.0 or later
CM3530mfp
20080821 02.066.0 or earlier
20081210 53.011.2 or later
M9040/9050mfp
20071210 50.002.0 or earlier
20080405 51.011.9 or later
9250C Digital Sender
20071211 48.041.0 or earlier
20080404 48.051.7 or later
If the error is
related to a corrupt Kerberos configuration file, one way to try and prevent
the error from occurring is to clear the Kerberos settings from the printer
before upgrading the firmware. You can access the Kerberos authentication
configuration from the embedded web server of the printer. This feature will be
found on the settings tab of the embedded web server. Web Jetadmin can be used
to clear these settings as well. The restore factory settings command which can
be accessed from the control panel of these printers can be used, but in doing
so all the configuration settings will be reset to factory defaults. Install
the upgrade and test. If there is more than one printer that will be getting
upgraded I would suggest you test one thoroughly before proceeding.
The CM6030/6040 mfp printer might experience
some problems when booting up where the printer stops at stage 5 of 6 or hangs
and might display a 49.4C02. This could be caused by corrupt NVRAM values.
Starting with firmware revision 52.081.2, the NVRAM values are no longer being
written to the hard drive. These are now being written to directly to the
formatter. The following procedure should allow you to get past the reported
boot progress hang or the 49.4C02 error.
Turn the
printer off and remove the network cable. Turn the printer on and perform a partial NVRAM initialization.( Turn the
printer on, when the display starts to count the memory press and hold 3 until
all three lights on the panel are lit. Press 9 one time, and then press and
release START. Press 6 one time). The printer should boot past stage 5 and 6 of
the boot progress now and not display a 49.4C02. Cancel out of the wizard setup screens. Turn
the printer off and connect the network cable. Turn the printer on and perform
a cold reset.( Turn the printer on and when the printer shows the memory
counting press and hold the 6 key until all three lights on the control panel
are lit, release the 6 key. Press 3 or 9 to scroll to cold reset and then 6 to
select). Flash the latest available firmware to the printer.