I have just changed my ink cartridges for the first time and the printer does not recognise them. The error message is "Cartridge Problem: Please remove and reinstall the indicated cartridge ... etc."
I have tried the switch on / unplug for 60 seconds / restart method and it does nothing.
I have also tried with 2 different packs of genuine HP ink cartridges - that's expensive!
The solutions on the site dating back some years seem to be replacement cartridges - I am hoping for a quicker solution as I am on a deadline here.
If someone could contact me asap, I am need of your assistance.