When my computer goes into sleep mode, it will sleep but the tower will stay active (fans running). When I want to awake from sleep mode, the keyboard and mouse do not wake it up. the power button and reset button are also unresponsive. The only way to restart is to turn off the main power on the back. I thought it was a bad operating system but I reinstalled Windows 7 Pro and I still have the same issue. Could it be a hardware issue or could it be a setting in the bios? Can someone help? Thanks in Advance!