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Re: MTP3550 & MTM5400 NOT SWITCHING ON
Freon UART recovery instructions:
PIN 6 = Flash pin on rear, disconnect power from radio and apply +12V from same PSU as radio is connected to pin 6 on accessory connector with programming lead attached (just go through accessory connector or add another pin)
Start CPS+ Depot
use FREON UART HOST
Custom secure
under AIS file select attached bin file
DO NOT CLICK wait for bootme
when you click START as soon as you press it apply power to radio, timing essential, radio should scroll down messages in window then say DONE, if not keep trying the procedure.
Then you can use "detect radio on rs232 port", write entire codeplug to radio, then write appropriate firmware
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