E90 bmw radio not working

[Dawie #3]

Hello everyone. My E90 professional radio just stopped working.. The lights does come on but no screen or sound.. My seat belt warning sound also does not come on. I checked all fuses including behind the radio.. They are all good.. Any idea what could be the problem?

 

[Dmonic1]

I had a similar problem, its works BUT no sound at all, turns out my MULF unit was faulty, bought an optical loop cable off amazon and bypassed it, worked perfectly afterwards. You should troubleshoot, check your Amp, Mulf first.

 

[Dawie #3]

I had a similar problem, its works BUT no sound at all, turns out my MULF unit was faulty, bought an optical loop cable off amazon and bypassed it, worked perfectly afterwards. You should troubleshoot, check your Amp, Mulf first.

Thank you.. where is the Mulf unit located in the car? I don't see anything in the boot under the carpets?..

 

[Dawie #3]

Thank you.. where is the Mulf unit located in the car? I don't see anything in the boot under the carpets?..

I have an 09 face-lift 320i

 

[Dmonic1]

Are there any components under the carpets? trace the optic cable to see, hope it not the amp, that will cost a bit