How do you reset the computer chip on a BMW 1994 740?

Q: yes, just bought it and the radio doesnt work. the guy said to go to the dealership and have the chip reset. ANy ideas on this A friend though that if you disconnect the battery, then it would reset itself. Apparently the battery is under the passenger seat and hard to get at Looking for ideas first

A: I belive disconecting batter will work. Other wise you need someone that has computer that will reset it for you.

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