Thanks Vikram. I have done all down to the part about updating firmware. In the smart app, there is no advanced settings or anyting that takes me to the current firmware edition or to check for updates.
Can you please advise how to find it. Ta,
PS as things stand, having done the reset, restarted the router, removed and reinstalled the smart app and loaded up the cartridges, the printer jam icon is still showing on the printer.....