Help: Stereo doesnt work

[Franklin Joseph]

2003 X5 4.6is with DSP

This morning, started the car, clicked accept, then the NAV come up. I turned on the radio button, it doesnt light up. Radio wont turn on.
Shut the car off, waited 30 secs, restarted, same thing. Drove to work.

I clicked on DSP, it was on. I tried turning it off, the off button wont work. Got to work, parked it.

I just checked the car during lunch time. The radio button still wont turn on. When i click the menu button, now the DSP option is gone.

Any know what's going on?

Not sure if this is related, but i replaced the NAV disc last week (no problems till today) and last nite i reinstalled the stock airbox.

Any Ideas?

Thanks
Franklin