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Try pulling the power cord to the printer, so that it is totally powered Off. (Press the Power button now, or flip the Power switch to On, so as to totally drain it of power.)
Then let it sit for at least 2 hours.
Then at the end of that time only, plug it in to power again, turn On if necessary. See if it revives. If not, it is probably damaged (provided the outlet you plugged it into has not tripped its circuit breaker, or its ground interrupter either, and is provably providing good power to whatever device is plugged into it.)
If damaged, it will require repairs. Or replacement. If it is within 1 year of its purchase date, contact Canon (at 1-800-OK-CANON) and put in a failed-within-warranty claim on it, for free warranty servicing/repairing.
OK. Let me know how it goes, at your convenience.
Is there any numeric code cited on the printer's screen?
Or, is the Power (or other) light flashing ? if so, count the flashes and their color, and let me know, please.