Incompatible Ink Cartidge

[qui7master]

I have a HP C4480 which is ok but all i get lately is the words '' iNCOMPATIBLE INK CARTRIDGE''. Whatever i try does not work. Can anyone help please.

[Tuvok]

Is it a genuine cartridge?

Are you sure you have the right catridge?

If its individual colours, are you putting the right cartridge in the right slot?

Do you have a spare or old one you could try again?

[Buenchico]

I've found a similar question (for the same printer) on another website. The solution that worked in that case is copied and pasted (complete with the original typos!) here:
1. Press X power at the same time 2. Press BLUE, GREEN, GRAY 3. press BLUE until you see "INFORMATION MENU" 4. press OK 5. Press Blue until you see "CHECKSUM FOR RELOCK DATA INPUT" 6. OK 7. Press X until you exit all menius 8. When promted for aliement cancel it with X. It should bypass the error

If you can make sense of that lot, it might be worth giving it a try.