crazyflie2 don't work

[justinleeyang]

hi, all:

my crazyflie2 don't work, maybe nrf51822 or stm32f405 issue,
when power up, the M4 red led blink, then off.
how to verify it fastly ? have we test code for debug?

and Rev.C and Rev.D difference ?

[arnaud]

Could you describe a bit further: What is the state of the other LEDs? What firmware are you running?

There is no functional difference between rev.C and rev.D.