I'm a newby to Porsche...just bought a beautiful 1999 911C4 Cab and have my first question. The radio (CR 220) was working fine, I just haven't turned it on in a few days. This morning, the light in the middle of the radio is blinking, but the radio won't turn on. Anybody have any ideas?....probably some stupid thing I've done....but could use someone's advise.