Hi everyone. Last night my Tibook usb ports stopped working. The mouse(macally optical) stopped working and the optical sensor and light went off. I restarted and the mouse worked again, but very choppy with the light flickering. THen it went black. At first i thought it was just the mouse, i tried to other mice i have and neither worked. I hooked up my digital camera to the usb ports and OSX didn't see it. Now when i start up the tibook, the mouse lights and works for about a second(very choppy) then the optical sensor and light turn off and the usb ports are dead. My trackpad still works but i need the usb ports, i do graphics and need to use a mouse and usb add ons such as camera, scanner, printer. Please help I"m running a 500mhz rev A tibook. I have 10.2 installed. The computer has worked flawlessly since i got it over a year ago.