Officejet Pro 7740 Suddenly Rejecting Third Party Cartridges - Printer Not Working

[GDLanson]

Hello
My 7740 used to work well with third party cartridges, now it has said they need to be replaced to carry on printing. I will not pay over £100 for the same product from HP. I use a Mac. Is it possible to download an older legacy firmware update for the printer so that I can print?

[Raj2111]

Hi @GDLanson 

Welcome to the HP Support Community.

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

I see that you have an issue using non-HP ink cartridges on your printer.

A) Please follow the steps below to fix the issue.

1) Take out the cartridges

2) Unplug the power cord from the printer & wall.

3) Press and hold the power button down for 15 seconds and release the power button, wait for about 30 seconds.

4) Plug the power cord back into the printer and wall, ensure the printer is plugged into the wall & not into a surge protector.

5) Insert the cartridges back into the printer.

Remove the cartridges > Unplug the power cord > Wait for 30 seconds > Plug the power cord back in > Insert the cartridges

B) Kindly refer to the steps on this link to update the printer firmware and let me know if that resolves the issue.

C) If the issue still persists, refer to this link for more information related to using non-HP ink cartridges.

If you are using generic or Non HP ink cartridges and the above steps do not help. You will have to contact the generic ink cartridge manufacturer to assist you further with it or you will have to use genuine HP ink cartridges to resume printing.

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.

I hope this helps.

Take care and have a great day ahead!

-Regards
Raj-HP Support