I am using the newest bios (5506)
My problem is that when I plug in a second wireless keyboard/mouse combo using USB my computer does not post and instead stays on a black screen with a hyphen on the top left corner and just continuously beeps FOREVER and will not post! When I turn it off and unplug it and try again, it works flawlessly!
What could be the problem? This has only started recently, it has never had any problems having 2 sets of mouse/keyboard combos before. Also I have tried plugging it into all the different USB ports on the motherboard to no success!