I ordered this in December but only used about 5 times. Sometimes I've noticed that it doesn't turn on when I plug it in (doesn't light up). But after plugging it in a few times, it finally went on. After doing some quick soldering today, I ran into the same problem. but this time I tried every socket on a 6-pin socket. Each plug gives the same answer - on/off/on/off differently. I then looked at the soldered wires going to the plug, if I just moved those it would toggle on and off. something is wrong with the wires. I stop using it. Good price for a set but not worth the risk. Hope others don't have this problem.