I assembled the kit and all the tests were flawless. I attached the tube and powered up the unit. Everything, all the displays, seem to work when the "menu,set and+" buttons are poked and prodded. When the "set" button is pushed after the seconds are set the clock does not advance the display.
I have double and triple checked the solder joints and they all seem fine. Thinking the watch crystal was suspect I replaced it with an ABT38T, 32.768khz watch crystal. There is no change in the behaviour of the display.
Question: in order to check the output of the crystal oscillator circuit, where on the board do I attach the oscilloscope leads.
Or is there another possible issue that I am overlooking.

