I just got a used Mac Mini (1.42ghz bought in 05) from a friend because she got a new computer. Took it home, plugged it in and hit the power button. After hearing the startup chime it shutoff completely. Now it will not turn on at all, no lights, no startup chime, no noises. I tried unplugging it for awhile and plugging it back in. I also tried doing the pram reset.... nothing. Is there anything I'm missing that could prevent this computer from turning on? Any help would be appreciated.