I bought one used here on the forums and never got it to work. The seller claims it was working the last time he used it. We also have another that went up in smoke when it was plugged to a lipo correctly and the switch was in off position. There's a small burnt spot between the battery posts on the board. I get the same on that one, 1,2,6,7 leds. By what I'm reading here, I'm not going to waste my money sending it back only to fail again. I should have kept using blue or orange esc as those keep working without any problems for years. I've also been hearing a lot of horror stories about Tekin speed controls from other drivers.