"Why won't my iPod appear on my itunes screen?" için yanıtWorked for me. Before replacing the logicboard, if your ipod classic 6th generation (or any for that matter) won't sync. Try carefully cleaning all contacts on your hard drive cable and the logicboard with Ronsonol lighter fuel. Ronsonol does not leave a residue that rubbing alcohol does. I simply applied this with a cotton swab.