That device receives a classic TMC signal Radio (FM)

If it is not a problem with the signal or cable, which is easy to determine because the other device is working, then it is definitely due to the device itself
It is possible that there is a problem with the firmware, and maybe the chip has failed

Anyway
Code:
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nuvi27x9_530.gcd - [Only registered and activated users can see links. ]

I don't know why, it takes a very long time to even start downloading the file ... so I uploaded previous version