My printer is an HP LaserJet Pro MFP M28a without wi-fi.

[RuSlIdZe3101]

Hello,

My printer is an HP LaserJet Pro MFP M28a without wi-fi. There are only buttons CANCEL, COPY and ON/OFF.
After a successful firmware update, I see only rbx-load.
When I switching on the printer I have always the LEDs "Ready" and "Attention" lights ON.
Please send me the reset instructions for the HP LaserJet Pro MFP M28a printer?
g.

[Max3Aj]

@RuSlIdZe3101, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 

Based on your description, where the printer displays "rbx-load" after a firmware update and both "Ready" and "Attention" LEDs remain lit, this typically indicates a firmware corruption or bootloader issue.

Here's how you can proceed:

Power Cycle the Printer

• Turn off the printer.
• Disconnect the power cord from the wall and printer.
• Wait for 60 seconds.
• Reconnect and power it back on.
• If the issue persists, proceed to the next step.

Attempt a USB Firmware Recovery

Since your printer does not have Wi-Fi, you’ll need to use a Windows PC and USB cable.

1. Download the latest firmware for your printer:
   • Visit the HP M28a support Page and select Firmware from the list.
2. Run the firmware update tool:
   • Connect your printer via USB.
   • Launch the firmware updater.
   • If the printer is detected, proceed with the update.
   • If not detected, the printer may be in a non-recoverable state and will need service.

Reset the Printer (Factory Reset)

Unfortunately, the HP LaserJet Pro MFP M28a does not have a built-in reset button or menu due to its minimal control panel. However, you can try this:

• Unplug the printer, then press and hold the "Cancel" and "Copy" buttons.
• While holding the buttons, plug the printer back in and continue holding for 10–15 seconds.
• Release the buttons and see if the printer initializes normally.

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support 

[RuSlIdZe3101]

Hello, unfortunately, this didn't help. The printer still appears in the Device Manager as HPrbx-load. Unfortunately, I'm unable to update the printer's firmware because it's not being detected correctly. I've tried the suggested methods several times, but unfortunately, it hasn't worked.

[Max3Aj]

@RuSlIdZe3101, Thank you for your response,  

I'm sending a private message to assist you with the next action. 

  

Please check your Private message icon on the upper right corner of your HP Community profile Next, to your profile Name, you should see a little blue envelope, please click on it or simply click on this link. 

  

I hope this helps! Keep me posted. 

  

Max3Aj

HP Support