Scanner light on HP Officejet J5780 does not come on.

Use Avery Label sheet.
Set correct paper size on Word and the Operating system.
Use label from Sheet feed tray only.

According to the printer specifications for the Officejet 8600 Pro Plus, the following label sheet sizes are supported;

HP Officejet Pro 8600 All in One Printer series N911 Manuals

Try using the HP Print Diagnostic Utility in Windows - HP Customer Care (United States - English).

If you need more help come back.Post / thumbs / testimonial are welcome!

you document was place in a different direction, try to place the document in the right place and scan again.
hope this helps

get a new printer!

Try to disconnect the power cable from the back of the unit and reconnect it after few secs. The alingment will start itself. Complete the alingment once.

Normal 0 Normal 0 Disconnect the printer or at least be sure it is turned off. I'd do both and when the CD software program asks you to connect the printer to the USB port, do so and it should again work properly.
Hope this helps. Bud

Our HP Officejet L7780 displays the "Align Printer" message and then does it automatically wasting several sheets of paper aligning, then the next time we print a page the same message comes back. Is there a way to turn off the "align Printer" message. It is printing ok otherwise.

Instead scan all images with standard settings, combine into one acrobat and then apply the settings to whole PDF

I have an OfficeJet 5780 and I have to do the alignment also. The allignment page it prints should have instructions on it. Just put it in the scanner and press "Enter". It needs to scan it to align the print heads.

This is from the manual on their website:

The HP Officejet prompts you to align cartridges every time you install or
replace a print cartridge. Aligning the cartridges ensures high-quality output.
To align the print cartridges when prompted:
1 Press Enter on the front panel.
An align cartridges (test pattern) page prints.
2 Load the align cartridges page face down in the ADF between the paperwidth
guides and press the Enter button again.
3 Recycle or discard the page.

Geno

I also had this problem, through trial and error I found that if you go into File, Page setup in excel then the Page tab, make sure the print quality is set to 600 dpi. Once I did that it printed correctly.