unlock code car radio 156 blaukpunkt

[indiano16]

Hello everyone I am indian, 16 and I'm a beginner I wanted to expose my problem this?:
I changed the battery in my alfa 156 and now the car radio is nn pi? or best wishes to a secret code which I why? I bought the car second hand and I knew that I could run into this problem I don't know if you can help me, in the meantime, I put the numbers that are on the dashboard of the car which I think is necessary to go back to the code
Pb 7640378316
Prod.nr Fiat
1560342090
I apologize again for nn I presented before, I hope someone can solve the problem.
Waiting for your reply thank you in advance...hello to soon indiano16...

[egs]

I see that you had...! Read the code that c'? written on the side of the stereo that starts with BP....