Hi, I just bought a cosmetically perfect but used MOXF6 from Amazon. When I turn on the power I get the start up screen and it displays the correct screen for start up, however the only button or control that works after that is the Data Wheel. I can turn it to move through sounds (and hear the new sounds) but no other button or control is functional at all, no lit buttons or anything. The music store/Amazon vendor believe it maybe a defective power supply PA-150 and wants to send a replacement. Anyone else had an issue like this?