Hi all 1st post! Well today I did some rearranging in my studio, turned everything off and unplugged everything. About 1 1/2 hours later I had everything were I wanted it and plugged everything in and turned on like always. No Firewire any more, it died. Call apple support and we worked over it, it's dead, no more firewire. The oddest thing, it was working fine and then died. So were can I get a logic board for this thing, it's model A1347? Thanks for your time.