When I bought my Boxster, it had a Porsche radio in it with a cassette player.  I don't have cassettes anymore, and I listen to audiobooks on CD as I drive.  We bought a Kenwood radio from Crutchfields.  My problem is that the sound doesn't come on all the time when I start the engine.  Sometimes it does, sometimes it doesn't.  When it doesn't, I can see the seconds counting down on the panel, so it's playing the audiobook.  Occasionally it will suddenly start playing after a few minutes, where ever it is at that point in the book, so I have to hunt for where it was when I last parked.  If I turn off the radio, then restart it, cycle through all of the Pandora, local radio, etc., and get back to the CD setting, it will usually have sound immediately.  I shouldn't have to do that, though  
This seems like a problem within the radio itself, or the settings. The buttons are so tiny I can't read them even when parked.  The instruction manual didn't help.  Any idea where to start troubleshooting?  I'm about ready to toss it in the trash.