Single-Function: CS720, CS725, CS727, CS728 and C4150
Multifunction: CX725, CX727, XC4140, XC4143, XC4150 and XC4153
The print quality depicts no black printing, no grayscale for the most part, only solid color (cyan, magenta, and yellow).
The color prints have no shading and will not appear light but solid or dark in nature unlike if the printer is only missing the black plane. Refer to the KB article Missing one full color plane.
Open Door B.
For single function printers
For multifunction printers
Remove the waste toner bottle (WTB).
Remove the imaging kit. Pull the unit out of the device and set on flat surface.
Press on the imaging unit's rear contact found just above the transfer module on the far right side to ensure it springs back out.
Reinstall the imaging kit.
Insert the waste toner bottle then close Door A and Door B.
Perform a test print and check if the issue persists.
If this occurred upon a new install, replace the COLOR imaging kit. Refer to Replacing imaging kit for the steps. Else, perform the troubleshooting found in the KB article Missing one full color plane.
Still Need Help?
Have the following available when calling Lexmark Technical Support;
Printer serial number
Toner/imaging unit/waste toner bottle part number and serial number
LEGACY ID: SO8694