last update firmware for hp officejet 7740 block old cartridges

[desegno]

Hi guys we have a big problem.

Have bought 11cartridges for hp 7740 but is impossible use it after the upgrade of firmware 16.04.2019 number 1912A.

So we cant use old toner.

Can downgrade the firmware? how can use it?!?!?

help please

[Betty0610]

@desegno

Welcome to the HP Support Community.

You cannot downgrade the firmware. Do you get any error message?

Let's try to reset the Printer here:

Turn the printer on, if it is not already on.

1. Wait until the printer is idle and silent before you continue.
2. With the printer turned on, disconnect the power cord from the rear of the printer.
3. Unplug the power cord from the wall outlet.
4. Wait at least 60 seconds.
5. Plug the power cord back into the wall outlet.
6. NOTE: HP recommends connecting the printer power cord directly to the wall outlet.
7. Reconnect the power cord to the rear of the printer.
8. Turn on the printer, if it does not automatically turn on.
9. Wait until the printer is idle and silent before you proceed.

Also, try connecting the Printer to a different wall outlet directly.'

Let me know if this helps.

If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution button, that'll help us and others see that we've got the answers!

Thanks!

Have a great day!

[desegno]

Tnank you for answer Betty0610 but dont work.

hope in other t&t.

best regards

[asmita6658]

Hi @desegno

Try these steps - HP printer ink cartridge issues

If the issue still persists, I have sent you a private message with the steps to perform a reset. Check next to your profile Name, you should see a little blue envelope, please click on it. 

Let me know. 

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

Have a great day!

[desegno]

Hi asmita, thank you for answers, ive tried but dont work.

after reset printer is locked because not see the black cardrige. This is a big problem. If buy original set and dont work????

ive buyed 4 cardriges compatible but not work nothing. This isnt politically correctly. Im a hp printer fan but after 10hp printer only now used 3 hp think is moment to change printer's brand.

are five days that we have this problem....

sorry 

[asmita6658]

@desegno

Thanks for trying. At this point, I'd suggest you Contact HP in your region for the next course of action. 

Have a great!

[desegno]

hi asmita, ive call the customer care in Italy. Nothing. now buy a original cardrige to see if is ok.

thnaks

d.

[desegno]

thank's roseee test it!!

thank you

[kheselden]

I HAVE THE EXACT SAME ISSUE. IM STUCK WITH INK THAT DOES NOT WORK NOW THAT THE FIRMWARE HAS INSTALLED

THIS NEEDS A REPAIR

[Iron_Age]

HP has done it again.  The latest firmware upgrade to EDWINXPP1N002.1942A.00 has made all my ink useless.  Bad Move HP.  Since this is an ongoing problem, what is the value of your printers?