Problem on Delphi RMC Nav 4G0 035 193

Hello everyone,

I have a big problem on 2010 Audi A7 with Delphi RMC Nav (part n. 4G0 035 193 LOW Nav).

System starts and works good only for 30 seconds, after it will shout down.
If I restart with volume knob, it will restart and stay ON only for 30 seconds.

All feature work good (audio, nav, radio, media) but only for 30 seconds.

It's possible to repair it or I have to change ?

I tested it outside of car and same problem. The problem isn't optic fiber, it works good.

Thank you
Best Regards