I have been using my dell mono mfp B1165nfw with the same Dell Inspiron 620 Desktop (Windows 8.1 64-bit, up-to-date) for a few years.
Occasionally, I scan documents to my Desktop. Just today, I printed documents from my Desktop on the printer, signed them, and wanted to scan them. When I started to try to scan, after "warming up", I receive warning "beeps" and the text "Not Available" is displayed on the printer.
I am able to see the printer from the web browser of the Desktop <192.168.1.51/.../index.html>, all looks OK.
Any troubleshooting tips for me?