I finished assembling my clock then I plugged it into a power source (Input AC 120V 60Hz 130mA_ Output 12V 500mA Max 6W). It turned on an the display lit up with all zeros. I tried pushing the set, hour, minute, and det. buttons and nothing happened… I got fairly warm after about 30s. I went back through and checked my soldering job and re-heat/applied solder to my connections and it still does the same thing when I plug it in…