My friend has a Mac Mini '06 Model, with a 1.66 Intel Duo and 1GB RAM installed. The Mac will not boot up at all, although there is power and the trademark "bong!" sound when it is turned on. He was forced to recover his data off of it with a repair disc and an external optical drive. I feel that the OS is corrupted, and while my friend has all the original discs, he couldn't be bothered with it (it is not his main computer), so he left it to me to figure out. I have a single user Snow Leopard install disc that came with my Macbook - should I try to boot up with that, and possibly install it? He only has Tiger on there at the moment, so I don't think wiping the drive will be an issue. The hard drive wouldn't be bad, would it? He was able to get his data off of it, after all. If the mini doesn't boot from the SL disc, what should I do next? I've never dealt with a Mac that didn't boot before!