If your Integrator Series 760, 780 or 788 hardware is locking during boot-up and you have a 3rd-party external controller connected (such as an AMX or Crestron), there is a possibility that the controller is sending commands before the DSP is fully booted, corrupting the boot process.

Power-cycle the Symetrix hardware, then delay all external controller commands at power-up approximately 15 seconds to ensure the DSP is fully booted before it receives any commands.

Units manufactured after August 2009 have a feature that will block uninitiated / unsolicited serial data from an external controller during boot up.  Also, units communicating to external controllers via UDP/IP (made before or after August 2009) are unaffected.