I am using a 12 Volt (1.5A) power supply. Last night I wiggled, prodded, pushed, pulled, reversed, cleaned and prayed with no luck. When I pressed a couple of buttons on the Autostar controller, I could get a couple of others to light up. For example, after pressing a lot of buttons, I could press "6" and "4, 5 and 7" would light up. From my 12 volt electronics background, it would seem like something is not grounding right. I want to test the cable. Unfortunately, I don't even have a multimeter anymore. I guess I'm off to buy a new one...