White spots on laser printing.

[Rodiates]

My M277dw prints white spots on every 2nd page. Tried all fixes i could find with no results.

[sandytechy20]

@Rodiates

Welcome to the HP support community.

 Inspect the toner cartridge for damage

1. Remove the toner cartridge from the printer, and then make sure that the sealing tape has been removed.

2. Grasp both ends of the toner cartridge, and then gently rock the cartridge back and forth to distribute the toner.

   Figure : Gently rock the toner cartridge back and forth

   

3. Check the memory chip for damage.

4. Slide back the cartridge cover to expose the imaging drum.

      CAUTION: 

   Do not touch the roller (imaging drum) on the toner cartridge. Fingerprints on the imaging drum can cause print quality problems.

   Figure : Slide back the cartridge cover

   

5. Examine the surface of the imaging drum on the toner cartridge.

   • If you see any scratches, fingerprints, or other damage on the imaging drum, replace the toner cartridge.

   • If the imaging drum does not appear to be damaged, close the cover, and then reinstall the cartridge in the printer.

6. Try to print again to see if the issue is resolved:

Check the EconoMode settings

1. From the software program, select the Print option.

2. Select the printer, and then click Properties or Preferences.

3. Click the Paper/Quality tab, and then locate the Print Quality area.

4. If the entire page is too dark, use these settings:

   • Select the 600 dpi option.

   • Select the EconoMode check box to enable it.

   If the entire page is too light, use these settings:

   • Select the FastRes 1200 option.

   • Clear the EconoMode check box to disable it.

5. Click OK, and then click OK to print the job.

You can refer this HP document for more assistance:- Click here

I hope that helps.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.

[Repairatrooper]

Spots on every second page is most likely caused by a transfer belt issue. Are the spots consistent in size?  Can you post a sample? You can examine the belt by removing the cartridges and looking at the black or grey belt underneath. You will only see half of it so you may need to load and unload cartridges to force a rotation. You are looking for anything that might disrupt the proper placement of toner. Bits of label are a common issue or an actual tear in the belt.

[Rodiates]

Thank you for your response.

Yes i am getting one certain white figure with steady shape and size, on the left zone of the paper. Printing 6 pages in a row, the 1st has it on top left, the 2nd is ok, the 3d too, the 4th has it  on nearly bottom left, the 5th has it on nearly top left, while the 6th is ok again! I checked the black belt between 3 page prints, following your istructions, but found nothing. Thanks anyway.

[Rodiates]

I checked my toners and they look fine. Thank you. 

[Repairatrooper]

One thing to test is to run a couple sets of print quality sheets from the control panel of the printer. If the defect appears consistently on one color then you likely have a bad cartridge. If the page it appears on is random then likely you have something on the transfer belt, defects are not always visible, even touching the belt can result in a defect because your finger oils disrupt the toner transfer process.