Car Menu/Radio/GPS and blinker sound doens't work on 2001 BMW 740iL

My menu screen is dead. It does not light up or work at all, which means no radio and no gps. Also, when I use m y turn signal, it doesn't make the clicking sound - but the lights work. Is this somply a fuse problem o r something bigger? It happened gradually when some days it was on some days off - now it's just off. Thanks for your time.

Asked by for the 2001 BMW 740iL
Were you able to find a solution to your GPS problem? or the others? Were they all related?
Thanks for your time too!
1 more answer
my gps doesn't work, my radio works included the CD. but the screen in blank. thank u very much.