Took my control head apart, looked just like the picture you posted. Looked at buttons, couldn't tell what was stuck. Gave up and was going to put the unit back together but then it dawned on me to use the dvm to see if one was stuck. Cleaned of the green insulation and checked all of the buttons. The clock button was stuck. Took switch apart, unjammed the button, tried it and it worked! Thanks for the info! Got stereo and a clock now.