A critical firmware error has occurred.
Go to http: www.hp.com/
support/lj2410, www.hp.com/
support/lj2420, or
www.hp.com/support/lj2430.
Click Download Drivers and
Software. Check for the
latest firmware image version
at the bottom of the page. If
this firmware image is newer
than the one installed on the
printer and the printer can
receive a firmware update,
download the newer firmware
upgrade. Not all printer
models can receive firmware
upgrades.
Failing that replace the formatter