<!-- from fixya rte -->Green light flashes 8 times - Canon Office Equipment & Supplies

IF THIS IS A PIXMA IP2000, then
Eight flashes = Waste ink absorber* almost full. The printer has a built-in waste ink absorber to hold the ink consumed during Print
Head cleaning. Eight flashes indicates that this absorber is nearly full.
Press the R R ESUME/CANCEL button to clear the error so printing can continue for a while.
A longer term RESET IS possible BUT without changing the blotters, you're exposed to ink eventually running out of the printer without warning but... if you still want to continue, here are the reset instructions. Good luck!
1) With the printer powered off, hold down the resume button and press the power button.
2) While holding down the power button, release the resume button and press the resume button twice in succession. Now release the power button. The indicator will blink in green and remain lit in green.
Now press the resume button 4 times and then the power button. You've just reset the waste ink counter. Good luck. Just hope it doesn't come back to bite you!