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Pardon me if I'm asking this question in the wrong place. I have a 2001 m3 with an aftermarket system installed by BMW (amp, sub, headunit, etc.). My battery had to be replaced recently and since then, I'm getting no sound from the speakers. The head unit is turning on, but no sound. I started my search regarding the fuse and it brought me here. Any idea what the problem could be and where I should begin troubleshooting?
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