ClaireDon,

Try a different Dell Series 9 ink cartridge?

Is it the color or black cartridge?

Rick

Its a colour and I have tried that 

claire

Claire,

You tried the old Dell Series 9 ink cartridge?

You tried another new Dell Series 9 ink cartridge. It is possible to get a Dell Series 9 ink cartridge with a bad sensor.

Rick

I was having the same problem with the cartridge alignment error..... followed these instructions to remove power brick for a minute....it worked!!

Thank you