HP Color LaserJet MFP M280nw network issues.

[Animatryx]

@FKHDK  

I have been following this conversation closely, and I want to acknowledge the incredible level of technical expertise and clarity you have brought to this discussion.

I understand that you have already verified all the relevant environment variables, from wired static configurations to DNS settings, and your assessment that a firmware level toggle may be the missing piece for your workflow makes complete sense.

There's one thing we can try though the device has reached the end of its support life and no new firmware will be made available for it anymore, it's called an NVRAM reset and the procedure or steps cannot be shared publicly as it may damage printers of other users if used incorrectly or on other models. 

I've sent you the steps in PM, kindly click here (https://h30434.www3.hp.com/t5/notes/privatenotespage) to check your inbox and reply to me

[FKHDK]

Thank you for referring me to the specific document..

I have attempted to locate the document through HP support resources, public searches and archived sources, but I have unfortunately been unable to find a working or publicly available copy. If there is an updated or functioning link available, I would greatly appreciate it and await your response with anticipation.

For the upcoming waiting period, I have temporarily implemented an external keepalive mechanism that periodically generates network activity in an attempt to prevent the printer from entering the state where the issue occurs. Since the maximum period the printer can stay awake for is 8 hours, I chose to poke it every 6.

So far, the symptoms seem to indicate that the printer itself remains operational locally (display and functions continue responding), while the network side becomes unresponsive after extended inactivity, where only a physical power cycle restores connectivity.

As a side note, since the original discussion involved serial number restoration, I found the available PJL functionality to be rather limited. Without access to the referenced service documentation, procedures such as serial number restoration can become a somewhat daunting task.

I would also be interested to know if there are any updated public service articles or known firmware notes related to network behavior or deep sleep on this model.

Regds

P.S: By the way. Links to the specific documents, exists EVERYWHERE in this forum, i would know because this is the ONLY place the document is referenced... Unfortunately ALL of the links are dead.  It can't even be scrunched up via the wayback machine.

[Deep_World]

Hi @FKHDK,
 

Thanks for your response and Thank you for your detailed update and for sharing the steps you’ve already taken to mitigate the issue. 

Regarding your observations: the printer remaining responsive locally while the network side becomes unresponsive after extended inactivity does align with known behaviours related to sleep mode and network deep sleep. 

Kindly refer to this published guidance and community discussions that may help you refine your workaround and help with the  solutions:

1.Sleep Mode Behaviour ( Click here )– This article explains how the printer automatically enters a lower-power state after inactivity and how it resumes when a job is sent.

2.Try to check if your able to use this guide to Turn Off Sleep Mode  ( Click here )– Community discussions on disabling or adjusting sleep mode settings, which may help prevent the network dropouts you’re experiencing.

3.HP Color Laser MFP M280nw Network issue  ( Click here ) – A thread addressing similar connectivity concerns, including firmware notes and troubleshooting steps.

These resources provide updated insights into sleep mode and network behaviour. If firmware updates are released for your model, they are typically posted on the HP Support website - https://support.hp.com/ , and I recommend checking periodically.

I hope this helps.

[FKHDK · Accepted solution]

I have to admit, this gave me a pretty good laugh 😄

You ended the support reply by linking me to a "similar discussion" and suggesting I read it... only for me to discover it linked straight back to this very thread and my own original post.

For a brief moment I entered a recursive support loop.

That said, I may have a working theory and workaround attempt:

The printer itself appears to stay alive, but after extended inactivity the network side seems to become unreachable — possibly related to sleep / deep sleep behavior.

Current workaround / thesis:

I happened to use Synology Task Scheduler because I already had a NAS running, but the idea itself is platform-independent.

Any scheduler should work (cron, Windows Task Scheduler, PowerShell, Linux, Raspberry Pi, etc.).

The concept is simply to generate a tiny amount of real network traffic before the printer reaches its sleep threshold:

[code]
curl http://PRINTER_IP > /dev/null
[/code]

Scheduled at:

01:00
07:00
13:00
19:00

Time chosen due to some scheduler wonkiness around midnight and repeating tasks.

The printer power-saving timeout is already configured to the maximum of 8 hours, so I deliberately stayed below that threshold.

I have also added minimalist logging of HTTP response code, response time and completion timestamp to make later troubleshooting easier.

The idea here is that this may not even be HP-specific. If the issue is tied to network sleep behavior, a tiny amount of periodic traffic could potentially work as a generic workaround for similar printers as well.

No long-term validation yet, so I’m calling this a working theory rather than a confirmed fix.

If it survives production testing, future-me may return with updates 😄

Come to think of it... you actually DID link me to a solution after all 😄

It just happened to be this thread — and a future version of me posting a workaround attempt.

So... thank you! 😂