It hangs on startup, its my friends macbook, bought in august of 2007. I reseted the RRAM, but still, no hope, after the second startup sound, it would just restart. and keep doing the "gong". I also did the safe boot by doing shift after the sound, and release when the wheel appears. I also did option and click the Macintosh HD, no hope, and holding down D hoping for the hardware test, no hope, I'm gonna ask him for the CD's to do the hardware test, and load it off there. also, fans are going up, I'm thinking its an HD failure. UPDATE: inserted leopard disc, disk utility, and, its announced...dead.