@VGH
Welcome to the HP Forums. I would be happy to help you with your HP LaserJet M127fn printer. I understand that you are unable to scan and you have already done some preliminary troubleshooting.
- Uninstall and reinstall the printer software again.
- Check Windows Image Acquisition settings.
- Temporarily disable firewall software on the computer.
Click here and follow the document to perform the above mentioned steps.
(Note: Though the title of the document is different, these steps should fix the issue)
Let me know how it goes.
Cheers.
Sandytechy20
I am an HP Employee