Epson 925?

I have a Epson Stylus Photo 925. I recently had a problem with it by putting an uncompatible ink cartridge, I changed the cartridge and the printer worked ok. I have been printing flyers & the printer started switching off and on quite regularly, now it says

ERROR
General Error
See your printer
documentation for
information about cleaning
the error

I have turned it off & on several times, unplugged it, changed the usb to another port, checked the power socket, but it is still not working.

Please can anyone help.