When the three LEDs are blinking rapidly (multiple times per second), this means the framework has run into an error. The best way to see the source of the error is to use the event logging system. However, you can also inspect the event log history via the Event_Logger_State variable on the ARM core. Open up an expressions window in the IDE for the ARM core and add this. You can scroll the various events and determine the one that generated either an ERROR or FATAL level event.
