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Common problems for Connectivity Issues
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‎09-09-2020 04:00 PM

HP Recommended
Product: HP LaserJet Pro 400 M425dw
Operating System: Microsoft Windows 10 (64-bit)

Hello there! There is an HP LaserJet Pro 400 M425dw, started issuing 79 service error. According to the recommendations on the HP website, the HP LaserJet Pro 400 M425dw was flashed with the latest firmware 20200714 from July 24, 2020. After the firmware, you can only connect via Wifi without a password. If WiFi has a password, it always returns an error when entering the WPA phrase incorrectly. Tried on different WiFi routers the result is the same. Tell me what to do to connect HP LaserJet Pro 400 M425dw to a WiFi network with a password?

4 people had the same question
6 REPLIES 6

‎09-09-2020 04:08 PM

HP Recommended

Is the wireless device you are connecting to a newer generation 5G unit? If so, compatibility has been an issue and sometimes setting the printer to only connect on a 2.4Ghz channel helps. 

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I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



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‎09-09-2020 04:23 PM

HP Recommended

No new generation 5G devices. Only devices with a 2.4 GHz channel.

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‎09-13-2020 05:58 PM

HP Recommended

It's the same with the other HP 425dw MFP. It was constantly rebooting with error 79. It was connected via a WiFi network. Before the firmware and after the settings were not reset. After the firmware, it stopped connecting to the Wifi network using the settings that were saved in it before the firmware. I need help!!!

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‎09-13-2020 07:24 PM

HP Recommended

Have you performed a factory reset and changed the IP address to one not used on the printer before? I am not sure why you are unable to connect after the firmware update, I have not seen this behaviour with any of my clients. Unrelated but I have seen a full fax memory cause errors and restarts.

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



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‎09-13-2020 07:42 PM

HP Recommended

On the first MFP, the factory settings were restored first through the MFP menu, the MFP was restarted and tried to configure WiFi on different networks, resulting in only a WPA phrase error. But the MFP connects to an open Wifi network. Then we did a hard reset like in the video(https://youtu.be/5bYp6SnQdVo). Connecting to Wifi gives an error after entering the WPA phrase.

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‎09-13-2020 07:50 PM

HP Recommended

The IP was changed and even transferred to another network.

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