Printer paper turns black for photocopy

[MukB]

Printer turns the paper black when given photocopy command

Hi

   I have a HP Laser Jet Pro MFP M125-126.I did not use the printer  for past few days.Today when I used it for printing photocopies  suddenly the printer has started turning the paper black after printing.Please check the image for reference and recommend some solution.

Thanks.

[Apone]

does the print quality change if you are printing an internal document?  If this defect only happens when copying/scanning, the laser scanner unit is defective.  If this defect happens with all documents you could suspect the toner cartridge or perhaps a grounding wire/spring is out of place and not making proper contact w/ the cartridge.