Firmware 6.20.1.15-202311221813

[FabAug]

Hello, I need to downgrade the firmware of my printer 9110b to 6.20.1.15-202311221813.

with the actual firmware the printer does'nt work, I can't print with my PLC.

Before this change, it was ok

[Max3Aj]

@FabAug, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
I understand you're experiencing issues printing from your PLC after a firmware update on your HP OfficeJet Pro 9110b, and you'd like to revert to firmware version 6.20.1.15-202311221813.

Important Notes Before Proceeding:

• HP does not officially support firmware downgrades for most printers, especially those with dynamic security features.
• Downgrading firmware may not be possible if the printer has "Downgrade Protection" enabled in the latest firmware.
• Proceeding with unofficial methods may void warranty or cause printer malfunction.

Recommended Steps:

Check for Official Firmware Availability

Visit the official HP support page for your printer model: HP OfficeJet Pro 9110b Drivers & Firmware

• Look under the Firmware section.
• If version 6.20.1.15-202311221813 is listed, download it.
• If only the latest version is available, HP may have removed older versions from public access.

Try Downgrade via HP Printer Update Utility (Windows)

If you have the older firmware .ful2 file:

• Disconnect the printer from the internet (Wi-Fi or Ethernet).
• Connect the printer via USB to your PC.
• Download and run the HP Printer Update Utility.
• Select your printer and choose the older firmware file.
• Follow on-screen instructions.

Alternative Workaround

If downgrade is not possible, consider:

• Rolling back the PLC software/driver to a version compatible with the new firmware.
• Using PCL5 or PostScript drivers if available. 

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 

[FabAug]

Thanks for your answer.

But I don't have the old firmware 6.20.1.15-202311221813. I can't use the HP printer update utility.

I would like to obtain this file for downgrade the printer. The printer is not connected to Internet only with a PLC.

Have you the possibility to send this firmware.

Regards

[Max3Aj]

@FabAug, 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