No sound, cd changer is frozen.

before you press the cd on button keep holding the eject button while you press power on, I know this works for computers etc.

bmw navigation radio cd changer repair

www.hitechserv.com/electronics-repair/oem-navigation-dvd-cd.../67

We repair all models of BMW GPS CD Changer Stereo ... shows on the screen, no audio, display shows no navigation disc but there is a disc inside, do not play CD. ... If there is sound but your blue tooth or satellte tuner is not working "if your car is equipped with blue ..... The MK3, MK4 computers has a GPS module built in.

3 Series (E46) built-in Sat Navs - Gassing Station - PistonHeads

www.pistonheads.com/gassing/topic.asp?t=862860

PistonHeadsJun 9, 2010 - I don't know much about the OEM sat navs, other than that they cost no less than ... would need to be re-positioned and CD player becomes redundant. ... on forums, they do the job, just about and sometimes not too well at all.

absolutely no idea ,do you have anything else plugged in that could cause the sound cut off although you say the radio works?or has a plug come loose in the back of the radio ,you could try one of them radio fitting centres as you never know some young lad comes out presses a button and it all works as you had the mute on or something but the radio works ,is it a built in cd player or a remote unit ? in my time a 8 track was the in thing these modern things are welll beyond your ancient dinasaur here .

Probably a loose ribbon cable. Solution attached., https://youtu.be/_GFGzP868Pg

The CD laser is dirty. Use a CD cleaner disc first, before replacing
the head unit. Good luck.

The cd changer internal mechanism is faulty, replace the cd changer itself.

Dude, i had the same problem. I tightened up the relay from the positive terminal on the battery that sits right next to the terminal, i took off the negative and put it back on, and unplugged the wires that go from amp to speakers and plugged them back in. started working fine. It would be your best bet to reset the comp by taking off neg. and putting back on.

change it.

Did you change the battery ? If so try disonnecting and reconnecting the CD changer.

TRY REMOVING THE RADIO FUSE & WAIT A WHILE. IT SHOULD RESET WHEN PLUGGING THE FUSE BACK IN.