Ok, here is what I have done so far. I have installed a Aux-Trk board version TN763C, once installed no errors. I verified that there is signal from music source, and that the wallboard is getting signal from PBX. As soon as I administer the sys features to change to music at port 01BXX, the yellow light comes on, on the board. If I run test board I get error code 1000??????? Please help!!!!