I'm having a problem with the sleep function on my desktop; I'm not sure what's causing the specific issues. It was working fine but now when i set the computer to sleep the monitor turns off but everything else seems to stay powered. The case fans, water pump, and graphics cards still run, but the keyboard and mouse get shut down. I would assume that the other USB devices also terminate but I am not able to wake the system with the keyboard or mouse. The mouse will re-initialize and turn back on but the computer will not wake. I haven't changed any hardware or made any significant software changes, so I can't figure out why all of a sudden it's broken. Any ideas?