August 3, 2012 at 10:40 pm #20835
The CPU is indeed initially configured to light up every LED in “P2” mode, so that should be OK.
With the default initial firmware, I am not aware of any common issue that would cause only blue LEDs not to light. You might try reflashing it with some of the other basic demo sketches, to see if they work correctly, or if you’re still having issues.
Also, what kind of power supply are you using?