HP D6028-90004 - Manual (Page 99)

Appendix F LED Codes
93
Action 2: The card firmware may be corrupted and require updating.
You may either use the firmware image that came with the card on the HP
NetServer Navigator CD, or you may download the latest firmware update
image from the HP NetServer BBS or web site (see Technical Support in
Appendix H). This image should be copied to your TFTP server (to use
the TFTP software, refer to Appendix C). If you are unable to complete
this procedure, call your local support center.
Action 3: Call your support center. If you need to call your local support
center, make sure that you have HP TopTools Remote Control product
information on hand including serial and version number. Also be sure to
note the relevant LED code and description.