9 Replies Latest reply: Apr 30, 2008 9:20 AM by icerabbit
jfred23 Level 1 Level 1 (0 points)
I put the G5 to sleep and go about my business. Maybe 8 or 10 times now, I come back into the room and the cooling fan is blowing at high rate. The computer won't come out of sleep, I have to force off and restart with the big button. Local Mac store (independent, good service dept) couldn't get it to repeat, I brought it back home, it has done it twice now in a week. My only recourse has been to shut it down - I fear this situation could have some fire risk. I think there are two possibilities:

- Thermostatic circuit is erroneously sensing high temps (the computer IS asleep)
- Thermostatic circuit is correctly sensing high temps

Anyone know if this fan speed is controlled by a separate board/circuit whatever that could be replaced? My G5 is 3 or 4 years old, I don't mind spending preventive maintenance money on it, and I want my sleep mode back. Suggestions?

G5 tower Powerpc, Mac OS X (10.5.2)