My canon printer ip3600

Question

my canon printer ip3600 has just come up with an error message that tells me to unplug it and take it to a service centre.
This printer was working perfectly until today
Please advise how I can clear the flashing lights

Answer 1

After digging a little more, I have a few more questions to you guys, if you don't mind.
1) Is it possible, at least in theory, that a profile has been created with its rendering curves adjusted in a way that BPC is sort of built-in?
AFAIK, BPC is not a part of ICC specification or a property of either the source or destination profile. It's a proprietary algorithm developed by Adobe, which calculates how the black should be shifted up, so that they don't end up looking like in Ian's example. My iP3600 being a low-end consumer device, maybe Canon decided to do it behind the scenes, so that any untrained amateur could get good/better result without doing BPC in Photoshop.
First, I've found an on-line printing guide by Canon which explicitly says "turn off BPC" (see bottom of page 5).
Second, my profiles' shadow regions look very different from any other profiles I've been looking at. Most profiles have a very distinct "toe", which shows shadow blocking and which the BPC corrects. My Canon profiles, on the other hand, have a very smooth shadow region, which lead me to belive they are adjusted for compensating shadow blocking.
Most profiles have a "toe" in their rendering curves. Mine don't
2) If my suspicions are true, can such profiles as my Canon's be considered faulty profiles?
3) If these are valid profiles, and even they are faulty, is not having BPC available in Lightroom acceptable? (You're telling me BPC almost always gives better results — it means there are some cases when it doesn't.)
4) And the last, rhetorical question. I often hear that canned profiles suck. Wtf? Is printer profiling rocket science or something? Why are manufacturers unable to make decent profiles for their own ink and paper?
Thanks in advance.