Need help!

[Silent1990]

My BMW G31 Head unit does boot loop(black screen) he's trying to boot, sometimes shows the logo at boot then black again, when I put revers gear camera on the back it show up and then black screen again.
If I check in ista+ its showing red box head unit and error no comunication.

Does someone has any solution to fix it? Thank you in advance.

[ek1978]

how did the problem started , is it a retrofit/replacement headunit or original one from factory , did you try to flash or code the headunit before this problem started ?

more info always help other members offering you help.