ENUS6937Affected products
Click
Properties
in the title section above. Overview 
Updating the firmware on a printer having a parallel card (27X2000) in it fails. This issue happens only when the printer's firmware level is prior to FW5.2.
Solution
In resolving the issue, the parallel card must be removed from the printer first then proceed with the firmware upgrade. Re-install the parallel card back to the printer after a successful upgrade.
NOTE: This is only an issue on the firmware level prior to FW5.2. After the firmware upgrade to level xxxxx.052.024 or later, updating the firmware will work normally without removing the parallel card.
Refer to xref_HO550_xref for the steps in checking, downloading and updating the printer firmware.
Still need help?
If you need additional assistance, please close this browser tab or go to the Lexmark support site, type your printer model and locate
Get in Touch with Lexmark! for contact information.
NOTE: When calling for support, you will need the following:- Affected printer model/s
- Printer serial number
Please be near the product/s described in this article to expedite the support process and reduce callbacks.
LEGACY ID: SO8774