HP DeskJet 4155 Offline all the time

[AtlasInsure]

Have had the Deskjet for 2 weeks and what a pain!  It keeps going offline.  I went onto HP to their chat to get help and they transferred me to a tech person that called me.  I was then told by the IT person that my IP address had been compromised and need a better firewall and Malware.  I was also told that this was the problem for the issue at hand.  I agreed and purchased both from this company that HP connected me to.  All was installed and multiple changes done to my Mac.  Printer still showing offline.  I was then told by the tech person that every time I want to print something that I have to unplug the printer.?  Really.  I like climbing under my desk to unplug the printer to print an item.  I also really disliked paying to items from the tech company to solve the issue that didn't solve the issue!!!  I could of purchased a much much better printer!

Disgruntled!!

[TEJ1602]

@AtlasInsure, Welcome to HP Support Community!

Let's try the below steps to see if that helps -

1.) Remove All Barriers: Certain building materials can get in the way of weaker signals like Bluetooth. Metal, bulletproof glass, concrete, and plaster are particularly bad, and marble, plaster and brick aren’t great easy. So if you’re really struggling with interference, your first step should be to move your Bluetooth devices away from these materials. That means no brick walls between you and your devices, and definitely no metal desks!

2.) Change Router Channel: If you have an Apple router and you’re constantly getting interference with your WiFi, try rebooting it. Upon restart, the station will search for a new channel. Specifically, a different channel than the one your Bluetooth devices is using to communicate. If you don’t have an Apple router, you may need to instead go into your router settings and try changing the channel manually. Experiment with different channels to see which one works best.

3.) Move Closer to Your Router: If you often find that you’re getting interference when talking on a wireless headset while on a WiFi call (you’ll know because you’ll hear static), try moving closer to your router. This will give you a more robust WiFi connection, so the Bluetooth frequency can’t overpower it.

4.) Get Away From Microwaves and Fluorescent Lighting: Both emit frequencies of 2.4GHz, and moving away from them will distance you from the source.

I'd like to know the following to isolate the issue further-

1.) Are the printer and Mac connected to the same network?

2.) Is your router dual-band enabled i.e., both 2.4GHz and 5GHz? If yes, make sure the dual-band has different SSIDs for 2.4G and 5G networks.

3.) What is the distance between the router and the printer?

4.) Is there antivirus software installed on your Mac?

5.) Could you perform a ping test using the Mac Terminal and let me know the results? Use the printer IP address to perform a ping test, the printer IP can be located by selecting the wireless icon on the printer display. Use the command Ping 192.168.0.1   after 10 pings ctrl c ( the IP mentioned here is just an example)

The wireless status menu on your Mac should also give us quite a lot of information that would help us identify the issue. You can press and hold option-click the WiFi icon and then use shift-command-5 to take the screenshot. Press the space bar when the icon turns into a camera. Share the ping test results and the screenshot with us.

Also, check with your Internet service provider if your router is able to forward 'Bonjour packets'.  Bonjour locates devices such as printers, other computers, and the services that those devices offer on a local network using multicast Domain Name System (mDNS) service records. The software comes built-in with Apple's macOS and iOS operating systems. 

Hope this helps! Keep me posted. 

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