Hi Gareth,Thank you for using Just Answer my name is ***** ***** I will help with your question. Have you tried a hard reset of the printer.
1. Unplug the printer for a couple of minutes.
2. Take out the paper trays.
3. Hold down the on/off button
4. Plug in the power - when you hear the start up music, stop pressing the power button.
The printer may report errors so you would need to address them. When the errors have all been fixed insert paper trays then it should be good to go.If this does not work let me know and I will help some more.