When introducing the Tesco's XL cartridges I answered all the questions that came up correctly but it went into error mode and I couldn't get out of it. I read a remark by another person who said the only way to cancel the error mode would be to replace the Tesco cartridges with HP ones. I went back to Tesco and luckily they refunded me the money and I bought the HP cartridges at a cost of £9 more and I didn't get the black in XL . They were much more exspensive. Anyway the info I had looked up was correct the printer now works again.
I am not happy with that it seems HP has put up a barrier stopping me using a product of my choice.