HP LaserJet M443 MFP

Dropouts

Suggested solutions

If faded areas, generally rounded, occur randomly on the page:

• A single sheet of paper may be defective. Try reprinting the job.
• The moisture content of the paper is uneven or the paper has moist spots on its surface. Try a different brand of paper.
• The paper lot is bad. The manufacturing processes can cause some areas to reject toner. Try a different kind or brand of paper.
• Change the printer option and try again. Go to Printing Preferences, click the Paper, and set type to Thick.

If these steps do not correct the problem, contact a service representative.

White Spots

Suggested solutions

If white spots appear on the page:

• The paper is too rough and a lot of dirt from paper falls to the inner components within the printer, so the transfer roller may be dirty. Clean the inside of your printer.
• The paper path may need cleaning. Clean the inside of your printer.

If these steps do not correct the problem, contact a service representative.

Vertical lines

Suggested solutions

If black vertical streaks appear on the page:

• The surface (drum part) of the cartridge inside the printer has probably been scratched. Remove the cartridge and install a new one.

If white vertical streaks appear on the page:

• The surface of the LSU part inside the printer may be dirty. Clean the inside of your printer. If these steps do not correct the problem, contact a service representative.

Black or color background

Suggested solutions

• Change to a lighter weight paper.
• Check the environmental conditions: very dry conditions or a high level of humidity (higher than 80% RH) can increase the amount of background shading.
• Remove the old toner cartridge and install a new one.
• Thoroughly redistribute the toner.