Last night, I used my computer (WIndows 7 32bit) with no problems. This morning, my mouse (a wired logitech g5) and keyboard (a microsoft wireless 6000 series) were unresponsive. I rebooted the pc thinking they had locked up and still no go. I switched over to a PS2 keyboard and mouse and still nothing, not even in the BIOS or on preboot menus. I know power is coming to the ports because if I plug my iPhone in it will begin charging. However I cannot get any keyboard or mouse combination to work. I tested the keyboard/mouse on another machine and they work fine. Is this a sign of a dead motherboard?