Flex 6700 fails to start up

Make sure you do a complete reset following these steps per Tim Ellison.

Perform a Comprehensive Cold Boot and Factory Reset of the radio

Please pay attention to the "wait times" that are part of the steps listed below. These are important to ensure the radio resets properly.

• Power off the radio by pressing and releasing the power button. Allow it to completely power down before continuing by waiting for the power LED to turn off (or amber if a GPSDO is installed). If pressing and releasing the power button does not shut down the radio, press and hold the power button until the radio shuts down.
• Once the radio is powered off, wait for 2 minutes to allow for all processors to properly shut down.
• Remove the power cable from the radio for at least 30 seconds and then reconnect it. It is important to remove the power cable from the radio and not just turn off the power supply. 
• After reconnecting the DC power cable, wait for 2 minutes to allow for the internal PSoC processor to boot up completely before continuing.

For FLEX-6700 and FLEX-6500:

• Press and hold the OK button while pressing and releasing the Power button.
• Release the OK button once the power LED turns white and allow the radio to continue booting normally.