I went home the other day to my clock radio playing (radio portion) and the display of 0 showing. Nothing overrides the radio playing and/or moves to a different menu item - it is like it is frozen. I have uplugged the clock radio and then plugged in, but it is still displaying just the 0 and playing music. How do I reset the clock? The manual does not say anything about troubleshooting. Thank you for your response.