My Radio died

[Angib]

The battery on my 1991 740 wagon died, when jumping it I connected the cables wrong - everything works fine (thank goodness) except the radio - nothing even displays on the screen for me to re-enter the code - the fuse was blown, replaced that, now what?

 

[johnwen]

you can try to replace the fuse, if it does not work. you can think about replacing a new one