My Canon Pixma ip4000 printer: I haven't used it in months, and barely
used it all before then, but just 2 weeks after my warranty ran out it
has decided to stop working. When power is turned on, the printer head
refuses to snap-to the center; it behaves as if it's locked or a pulley
(rubber band?) isn't working. The power light flashes alternatively
orange and green (which, according to the manual indicates a possible
"repair shop" problem.)

Firstly how many times does it blink. If it's something like 7 times
than it's a waste tank full error.