Head unit problem

[Gleb]

Hey guys, lovely forum you got here.

Im relatively new to BMW had mostly english cars before so would really appreciate if you could help me out.

I purchased a new head unit (aftermarket) and tried fitting it in, plugged everything in and it wouldnt power up, i then plugged in original unit back and i get nothing on the screen at all, it just lights up and all buttons light up but nothing at all on the screen and no sound... i have tried taking fuses 7, 73 and 75 out to no avail  any ideas what else i can try to remedy the issue?

Many thanks

[graemeX5]

Hi

I'm not the best but if you have a look at attached link I think try checking fuse 72

https://www.google.co.uk/search?q=bmw+e ... k8f0czM%3A

Graeme