I have a Gigabyte Z97-HD3 motherboard in my main desktop and this morning it wouldn't boot properly. The computer would start but there was no splash screen on the monitor and no power to the usb mouse. There was power to the fans so the power supply doesn't seem to the issue. I turned off the computer and moved the usb mouse to a different port and installed a known good video card. Reconnected everything and still the same issue. I am running a i5-4590 on the mb. At this point I thinking that the motherboard is at fault but would appreciate thoughts from the group.