Lexmark MX721
Intermittent or difficult to reproduce 171.xx/173.xx, 171.84 or 173.84 fan errors, usually once per day on first power-on or first print job.
Update the printer firmware using a special firmware code which can be acquired by contacting Lexmark Technical Support.
Make sure to ask assistance on how to perform the update on the printer firmware if needed.
If the issue persists, search for more information related to this issue or contact support for further assistance.
LEGACY ID: SO8915
The printer displays any of these error codes on the control panel: 43.40P, 43.40Q, 43.40R, 43.40S, 43.40T, 43.40U, 43.40V, 43.40W, 43.40X, 43.40Y or 43.40Z
Additional requirements for 900.xx errors related to DLE