Hi, I have an imac G4, Version 10.4.11. It has been working fine for many years, now all of a sudden, after trying to connect an HD Video camera to the hub, the mouse stopped working. Ever since, every time I start up the mac, the mouse and keyboard wont work, if I reconnect the mouse to the keyboard, both mouse and keyboard will work. If I then try and connect a portable harddrive to the usb hub, the mouse and keyboard will not work again. Please can someone tell me what is going on! Thanks in advance