Is this your first time trying to get it started? If so, you need to do a CSC (Controlled Stick Command, something like that). You move both sticks down and out to start the motors. It's all in the manual.
Can you connect to the Assistant?
If so, can you see the FM changing when you cycle the S1 switch?
That means you should be able to do a Compass Calibration.
Disconnect from the Assistant and do the 360 degree dance.
Now connect to the Assistant and do an Advanced IMU Calibration.
This usually clears up the "stuck in warm-up mode" issue...
Let us know?
Strange.. I plugged it in a few times before with nothing and this time it recognized a firmware update completed it and everything seems to be working fine now. Thanks!