Check very carefully whether all cables are plugged in correctly and all the plugs are connected properly at the correct position. Especially in the vertical direction, not just 2 pins must sit on the header. Also make sure that the polarity is correct on all connections.<br /> | Check very carefully whether all cables are plugged in correctly and all the plugs are connected properly at the correct position. Especially in the vertical direction, not just 2 pins must sit on the header. Also make sure that the polarity is correct on all connections.<br /> |