Alfa Romeo 939 blocked

[ziko]

Code by fiat dealer is known 3642
After power ON radio CODE - - - - on lcd.
Then when I enter code on lcd shows RADIO BLOCKED-WAIT

here is ori dump and also reseted by NYO4 , but still same problem

How to solve this?

Tnx

[Argento7]

Only a suggestion... check +12 volts (+B, Ignition and/or SAFE (if have) pins...) also good GND