20 Most Recent HP DeskJet 6840 InkJet Printer Questions & Answers

You need to print out a report from the printer on what its URL name is to be able to type it in your safari browser and look up and change the internet settings on page 23 of
There will be a setup program in the downloaded software or a driver setup program . Once you change the ip address of the printer to match your mac ip range and subnet mask you may find your apple IMAC may detect your printer and set it up automatically
You have to download the mac version of the driver on the
MAC as Apple has a different file system to windows.
note the dmg file extension
not straight forward read the forum posting below on how to open a dmg file and copy and run the contents

HP DeskJet 6840... | Answered on Apr 15, 2017

Hi there.

Actually you can. You can make it wireless if you have a wireless router.

Click this link for the manual on how to.

Hope it serves you well.

Thank you!

HP DeskJet 6840... | Answered on Apr 15, 2017

Try to re install driver and make it your defauld printer. Check your wireless conection.

HP DeskJet 6840... | Answered on Sep 11, 2016

Here's the answer:


The sensor is probably stuck, and it took me a few minutes to fix!!

Good luck...


HP DeskJet 6840... | Answered on May 15, 2015

Your printer is looking for your old router.
Reset the printer:
  • Verify that the printer is powered on.
  • Press and hold down the Report Page button.
  • While holding down the Report Page button, press the Cancel button three times.
  • Release the Report Page button.
Now, re-connect your printer to you new router.

Source :
Re Can Get DeskJet 6840 To Work on Wireless Network Need HP Support...

HP DeskJet 6840... | Answered on Apr 13, 2014

If you get this error:

Top Cover Open. The device cannot print because the top cover is open. Close the top cover and press continue, or cancel the printing.

then follow this guide:
HP Support document HP Support Center

HP DeskJet 6840... | Answered on Feb 12, 2014

Pop off the right side cover - it is just held with clips. At the hinge, you will see that the cover switch arm that is supposed to move up and down as the cover opens & closes (in the slot in the geared hinge) is probably broken off. It is in the up position when the lid is closed, and down when the lid is open. I cut the shaft of a Q-tip to length and wedged it into the space to keep the cover switch up all of the time and still allow free movement of the lid.

Geezer Geek

HP DeskJet 6840... | Answered on Feb 05, 2013

1.Power off printer
2.Open cover
3.closs cover
4.swich on printer

HP DeskJet 6840... | Answered on Sep 24, 2011

Once you plug in the printer it should try to install driver software. If it does not do this automatically then you can use the disc that came with your printer. Once this is installed try to print with Microsoft word or any other program and make sure the correct printer is selected. Hope this helps!

HP DeskJet 6840... | Answered on Jun 23, 2011

The HP Solution Center should provide you with your ink levels.

HP DeskJet 6840... | Answered on Mar 03, 2011

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