Bosch 2250 MP3 AUX NegDisplay

[Jannes01]

Hi,
Need some help with my radio.
I have two codes but i can't enter it.
Radio only shows "Code Error" and turns off after 15 minutes

fiat number 735 520 956 0
cm nr. 7 640 389 316
serial 815cm0389a1352641

[Dekster]

Hi,
Need some help with my radio.
I have two codes but i can't enter it.
Radio only shows "Code Error" and turns off after 15 minutes

fiat number 735 520 956 0
cm nr. 7 640 389 316
serial 815cm0389a1352641
Hi,
Try ....... 2366

[Jannes01]

Thanks, you got the right code.
But i still can't enter it, the radio only shows "Code Error" and turns off after about 15 minutes.
I've got the radio out of the car and have it on a charger, i've got three pins with constant 12V and one one ground. but still it goes on stand-by.
Is there a way to bypass this?

[Jannes01]

Still no luck ...
When I turn the radio on it only says "code error"
Can someone please help me to unlock this radio
Or how to program this eeprom and with what device?