We built 4 LE controllers and at least 2 but maybe all of them do not receive any data/DMX in. Controllers power on fine, and all channels light up in test mode. Dongle has tested fine and gets DMX. Took it to Lineman's house tonight and the ohms tested fine. Connectors are all touching. Solters on back have been retouched. What could it be? I got the kits in a coop. Thanks.