Hi, after some help.... My G4 PowerMac QS 733 running 10.5 wont restart. My daughter says it was going when she used it, but that a message came up that the USB port which had the mouse in it was being deactivated because it was drawing too much power. I think the mouses cord was damaged. She moved the mouse around the ports, and the computer deactivated them all and then shut it self down! I have tried plugging in other keyboards and another mouse, but to no avail. I have unplugged everything, including power. Now the when I try to restart, the start up light on both the screen and tower just flash as if the Mac is asleep, but the Mac doesnt start up and I get no start up tone. Any ideas?