Firmware downgrade

[DamonNorris]

Make sure ncat.exe and the firmware file  ojpro_8710_1834A_08212018.rfu are both in the same folder

[Hoosh]

How can I perform this procedure from a Mac? I don't have a Windows computer to use. Also, don't know if it makes a difference, but I'm trying to downgrade the firmware on an OfficeJet Pro 8625.

[DamonNorris]

I have no clue. You would have to find the Mac version a of the tools I use (if they exist) or maybe install Windows on a virtual machine. Good luck 

[Grbates]

SUCCESS!!!!

After my 8710 went through an automatic "upgrade" (this feature is now turned off) my non-HP cartridges would no longer work.  I  have a large supply of 3rd party cartridges on hand and have been very pleased with the quality.  After reading a lot of posts, I concluded that the reversal of the firmware was impossible, so I started to trash the printer and cartridges and buy a Non-HP brand.  But since I have used HP printers for the last 20 years, I searched some more.  I found this post and gave it a try.  I took a few hours to get every thing right - making sure all files were in the correct directory (file not found error), missing the "rfu" ext on the file name, and including the port (9100 in my case worked). I used the Cmd line version of Ncap. I kept getting timeout msgs, then changed time parameter to 10. Then I kept getting the message "transfer rejected by the host", corrected this by adding the 9100 port parameter.   I changed some cartridges to get rid of the no-hp message, but then got cartridge depleted msg since the only HP cartridges I had were empty ones.   Then the ftp didn 't give an error, just seemed to hang.   Finally out of frustration I hit the power button to turn the thing off and give up.  A green display screen suddenly popped up on the printer with 5 steps and a load file progress slide.  Took a few minutes, then the printer rebooted.  I put my new 3rd party cartridges back in and they worked.  A look at the printer info showed firmware version of 1834A (old) not the new 1928 version.  Printer is back in business.  Thanks DamonNorris .  Hope this helps someone.  Bottom line -  FIRMWARE REVERSAL IS POSSIBLE.

[DamonNorris]

Congrats!  Make sure you turn off automatic updates on your printer.  

[hadius001]

Hi Thanks , this helped us a lot . i do note that it looks like the page with all the printer firmware RFU files has been removed 

[xxx13]

Thank you for having the firmware file!

[xxx13]

Thank you! It worked!

[Peter7812]

Thx for the useful information including the firmware file. Was able to follow the steps as you outlined and my 8710 now accepts my refilled cartridges. 

[BZK728]

Hi all, I couldn't find the firmware needed in the FTP link provided on page 1, however I found old firmware for my device on this ink website, and it's a simple one click install to downgrade the firmware. Worked on my HP Officejet Pro 6968.

HP 902XL Printers

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HP 952XL Printers

After downgrading, make sure you disable auto-update checks!