Radio problems

I have a 2009 Rondo that has recently been having intermittent radio problems.  The radio and CD player just turn off for no reason that I can determine.  Usually, the radio will come back on eventually, although not always with sound.  That is, the radio display will come on.  The CD will cut off, but will not come back on until I mess with the power button.  Seems like a loose connection, but where?  And why does the radio sound remain off and all the buttons are nonfunctional sometimes, when the display comes back on.  It's driving me crazy, which is getting to be a shorter trip all time.