Lexmark 7464-036 MX721ade

Note: Before performing this print quality check, go to the control panel home screen and navigate to Settings > Troubleshooting > Print Quality Test Pages, and then perform the initial print quality check.

Actions	Yes	No
Step 1 a Turn off the printer, wait for 10 seconds, and then turn on the printer. b From the printer control panel: 1 Increase the toner darkness in the Quality menu. Note: 8 is the factory default setting. 2 Set the paper type, texture, and weight in the Paper menu to match the paper loaded. Does the problem remain?	Go to step 2.	The problem is solved.
Step 2 Check if the printer is using a genuine and supported Lexmark toner cartridge. Note: If the printer is using a third‑party cartridge, then refer the users to their cartridge supplier. Is the printer using a genuine and supported toner cartridge?	Go to step 4.	Go to step 3.
Step 3 Install a genuine and supported toner cartridge. Does the problem remain?	Go to step 4.	The problem is solved.
Step 4 Remove any packing material left on the imaging unit, including pieces of tape on the side of the unit and the red separator plastic. Note: You may need a pair of pliers to remove a piece of broken plastic inside the imaging unit. Does the problem remain?	Go to step 5.	The problem is solved.
Step 5 Replace the imaging unit. Does the problem remain?	Go to step 6.	The problem is solved.
Step 6 a Remove the right cover. b Make sure that connection J15 on the controller board and the connections on the HVPS are properly connected. Are the connections properly connected?	Go to step 8.	Go to step 7.
Step 7 Reseat the connections. Does the problem remain?	Go to step 8.	The problem is solved.
Step 8 Check all connections in the HVPS for proper connection. Is the HVPS properly connected?	Go to step 10.	Go to step 9.
Step 9 Replace the connections. Does the problem remain?	Go to step 10.	The problem is solved.
Step 10 Replace the HVPS. Does the problem remain?	Contact the next level of support.	The problem is solved.