Re-soldering both cables of the one for the 12V antenna and replaced the MICRO USB cable.
Counting the time I wasted I could have bought 10 new ones, but it was a challenge to solve.
HERE, with YOUR help, I tried everything you advised and now we both know that the thing has now finally failed.
Although when I plug in the cable the traffic subscriptions are still visible in service mode. In the basic menu for traffic information it no longer recognises the receiver.