I had the same symptoms with my CC - and it was a dry joint on the analog board.

The underside of the board where the shielded video amps sit had a dry joint. If you look on http://s14.postimg.org/6khbmega9/CC_Analog_Checklist.jpg there are two parts to the shielded section near the bottom of the photo. The device at the top of the smaller (lower) fenced area had the dry joint on the other side of the board.