A3 Printer HP Deskjet 7510 - needs attention (Lavant PO18)

All-in-one printer/scanner/fax, powers on OK but shows error message.
Prints A3 or A4, with auto-document feeder scanning A4.;
Not used for some time, so someone may be able to fix it, and probably needs new ink cartidges.
Very large and heavy, could deliver in Chichester area.