Print head tilt failure.
Check for damage or some sort of obstruction to the printhead.
With only 909 pages printed it would likely be under warranty.
I have a colorqube 8570DN. after turning it on it gets to about 11% of warming up and then stops, displaying printer error 91.720.00.909. it then tries to restart but keeps doing the same thing.
Might help to provide at least some basic information as to the product you have.
When the printer tries to start up it warms up to about 11% and shows a printer error 91.720.00.909. It keeps cycling like this until I shut it down.