Copies from my new HP LaserJet Pro M148fdw have a light grey backgound even with max lighter setting

[Nosceteipsum]

Printer is only (1) month old - everything works fine except light grey background on copying only (not prints).

[A4Apollo]

Hey there! @Nosceteipsum, Welcome to HP forums.

I understand you have copy quality issues with the printer.

Don't worry I'll try to help you out.

Did you make any changes to the printer?

Have you tried checking with a different ink cartridge?

Does the issue persist when you make a scan from the printer?

Try checking with a different ink cartridge and check if the issue persists.

Try updating the printer firmware and check if it helps.

Update the printer firmware using this link. Click Here

Reset the printer

Resetting the printer can force some types of scanners to calibrate, which might fix the problem.

1. Remove any items from the scanner glass and automatic document feeder (ADF), then close the scanner lid.

2. With the printer turned on, disconnect the power cord from the printer and from the wall outlet or power strip.

3. Wait at least 60 seconds.

4. Plug the power cord back into a wall outlet.

   NOTE: 

   HP recommends connecting the printer power cord directly to a wall outlet.

5. Reconnect the power cord to the printer.

Clean the scanner
Clean the automatic document feeder (ADF) rollers

Dust or paper residue on the rollers or separator pad inside the automatic document feeder (ADF) can result in copy quality issues.

1. Gather the following materials:

   • A clean, lint-free cloth, or any cloth that does not come apart or leave fibers

   • Distilled, filtered, or bottled water (tap water might damage the printer)

2. Remove the original document from the ADF.

3. Turn the printer off, disconnect the power cord, and then open the ADF cover.

4. Find any paper pick rollers and the separator pad inside the ADF. These parts have a rubber covering.

   

5. Lightly dampen the cloth with the water, squeeze any excess liquid from the cloth, and then wipe any residue off the rollers and separator pad.

6. Leave the ADF cover open for two minutes to allow the parts to dry, and then close the cover.

7. Reconnect the power cord, turn on the printer, and then start a copy job.

Refer this article to further troubleshoot copy quality issues with the printer. Click Here

Let me know if this works!

Have a great day ahead! 🙂

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