radio does not turn on

[mybmauto]

The radio (including cassette etc.) in this 7 series does not turn on at all. We jumped the car a few days ago but don't know if this would caused a problem (everything else is fine). This car has navigation which is working. So we are told that radios with navigation do not have any codes. Any ideas or suggestions to get the radio going again? Would really appreciate it.

Thanks

[TECH]

Check fuses. If it's an E38, there are fuses in the ebox under the hood, as well as some in the right rear of the trunk.

[mybmauto]

Yes it is an E38. I checked the radio fuse under the hood and in the trunk. Both are good. I am told there is a fuse in the back of the radio unit. Is this true? and if so, is it easy to pull the unit out to get to this fuse?
Thanks.

[TECH]

I believe there is a fuse there, and that a 2mm or a 2.5mm allen should get it out.

[mybmauto]

Could not find any fuses in the rear of the radio. Any other suggestions? thanks.

[Kjay]

Try taking a test light and making sure the constant wire and the switched wire have power.

[EXtech]

I would avoid using a test light on a BMW, especially late models. A multimeter would be a beter and much more advisable choice. Check your voltage on both sides of the fuses. Sometimes those fuses can look ok but are actually bad.

[1996BMW750iL]

What year is the car? There should be a fuse next to the wiring harness in the back of the reciever. Is this the three part radio (reciever, eq, & MID). I had some problems with my radio too. when you turn your headlights on, do the buttons iluminate? I thought i'd lost power, but this wasn't the case, it sees to have been some kind of software related malfunction. I'm not sure about the security system, but you might be able to restore function simply by removing and reinstaling the radion components. I'm not sure what else to think.

Noah