Problem with APPLE A1047 POWER MAC G5 DUAL 2.7GHZ 2GB ATI Radeon9650: Random sleep, fan racing (single fan on hard drives), red LED on steady- not blinking. Fan racing: just the fan cooling the HDs and it begins immediately on cold start (not heat related). All other fans appear to run normally. Temp. Monitor indicates all temps normal. Sudden sleep: The G5 runs for a few minutes before winking out into sleep. In a few seconds, it comes back to life on its own. THen goes back to sleep. Also, easily re-awakes with a touch of the mouse. I've read related posts but none that exactly match my issues. Questions? Answers? Clues? Thanks in advance.