All HP printers are quite fussy on cartridges. Sometimes they just need the cartridge taking out and the contact panel cleaning off very very gently with appropriate electrical contact cleaner (Electrical Solvent Cleaner).I find the easiest way to diagnose these kinds of error is to use another cartridge and see if you get a different error / response.Even an empty cartridge is handy for this - it will just show up as being empty instead of showing an actual cartridge error.If the error is accompanied by the print head moving to one end of its travel and slamming to a halt, then this normally indicates that the plastic strip inside needs cleaning - a simple job but does require the whole casing being removed :(The service manual doesn't really tell much, beyond the main parts of the unit itself (I don't have a copy for that specific Officejet). As the cartridges are an all-in-one separate item it's not mentioned beyond saying where they fit.In general, it's down to either cleaning the contacts, or replacing, the full cartridge to get past most errors on most modern printers.
This is an internal electrical malfunction within the cartridge - I suggest you run the following two service tests: 1) You can 'temporarily' bypass an 'Incompatible Cartridge' error (or any other cartridge electrical malfunction error for that matter) by accessing the OJ's service menu...see the Inkjet411.com support youtube video found here:
2) You can also run the 'tap 41' diagnostics check on the HP 901 cartridge(s) electrical health, via the access code/procedure shown in the following video: