Canon BJC-4300 giving me jip

I'm not sure if i'm in the right forum or not but if this gets redirected then so be it.!

My Canon printer is giving me problems - it wont print !! The green light on the front of it keeps flashing and i get an error message saying that the pc can't communicate with the printer. It was working the other day... I have recently put new ink carts in it and they worked like a dream but now all of a sudden this piece of **** has stopped co-operating !!
All the cables are in and look fine, I installed the latest drivers and checked for paper jams, leaking ink, dust! etc everything looks good ???
Other forums and FAQ's suggest it is the printhead that is gone and I need to get a new one. Has anyone had problems like this before?, will i have to buy a new printhead? Any ideas would be much appreciated.

P.S./ Pushing the cartridge button just makes three beeps -nice but useless