Lexmark CX725
StepĀ 1
Disable the download emulation, and then program the download emulation into the firmware card again.
Does the error remain?
Go to step 2.
The problem is solved.
StepĀ 2
Replace the firmware card and download the emulation to the new card.
Contact the next level of support.
Lexmark CX/CS72x and XC/Cxxxx: Print Quality Diagnosis ? Printer Not Printing Black
Lexmark CX/CS72x and XC/C41xx: Print Quality Diagnosis Faded Black Print