I have the Canon Pixma iP4000R printer. I had an error code of 6A00 and my power light was blinking/flashing green-orange-green-orange-green-orange-green-orange-green-orange-green-orange-green-orange-green-orange-green-orange-green-orange-green-orange-green-orange (12 oranges).

I tried the “waste ink counter reset reset” procedure: Power on while holding the stop/reset button and pushing the service button twice, then pushing the stop/rest button 4 times to clear the error, but that didn’t work.

My ink cartridge carrier wasn't moving-staying in the center. I thought I had a paper jam.

I looked at a few blogs about my error on other Canon Pixma models and they kept talking about “sponges”.

The following is what I discovered that cleared my error and now my printer is back to printing!

The “sponges” are 2 hard pieces of absorbing plastic or something of the like. I was looking for a softer material like the long thin gray foam strip material in my printer. The 2 "sponges" on my Pixma iP4000R were next to each other-one was rectangular and one was square-like. Originally they were white but the ink made them black/navy.

The "sponges" are located on the right under where the ink cartridge carrier "rests".

I didn't see the sponges at first, as there was a white backwards “L” shaped plastic piece that had a spring attached to it. The “L” shaped piece was moved forward out of its place. I used my pen tip and pushed that piece back and found that the rectangular "sponge" had popped out of its place.

I used a pen tip popped both “sponges” out and rinsed them with water and voila they were once again white. I think the rectangular one had so much ink on it it popped itself out of place.

My error is gone and I can print again!