Camper part is dead

[Reis]

Hi,
I have a Marco Polo 2018 and the camper part do not have eletricity. Is completely dead, even conected to 220 v wall tension. Even connected to wall tension, the interior 220 v power outlet is also dead.
With the motor working, the camper revives and works normaly.
What must be the problem? What can I do to solve it?
Thanks

 

[DogWagen]

Possibly the circuit breaker below the mains socket/outlet...

 

[Reis]

Thanks Dogwagen
Can you please tell me where can I find that "circuit breaker"?
Inside or outside the car?

 

[DogWagen]

It's below the mains outlet between the kitchen and the left-hand front seat.

 

[Robert.Cornwall]

Is your control panel showing anything? If not then most likely your leisure battery is dead. I had the same problem. Bought new battery and everything works fine.