Dell B5460DN Printer is printing solid black pages, Repeating defects appear on prints

Printer is printing solid black pages
Action Yes No
Step 1
aReinstall the imaging unit.
1Remove the toner cartridge, and then the imaging unit.
Warning—Potential Damage: Do not expose the i maging unit to
direct light for more than 10 minutes. Extended exposure to
light may cause print quality problems.
2Install the imaging unit, and then the cartridge.
bResend the print job.
Is the printer printing solid black pages?
Go to step 2. The problem is solved.
Step 2
Replace the imaging unit, and then resend the print job.
Is the printer printing solid black pages?
Contact technical
support.
The problem is solved .
Repeating defects appear on prints
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Action Yes No
Step 1
aReplace the imaging unit if the distance between the defects is equal
to any of the following:
•47.8 mm (1.88 in.)
•96.8 mm (3.81 in.)
•28.5 mm (1.12 in.)
bResend the print job.
Do repeating defects still appear on prints?
Go to step 2. The problem is solved.
Troubleshooting 214