Okay, well I got to work on it today.. somewhat. It's a first generation iMac G5.. i think the specs were 1.6 GHz/ 256 MB RAM/ 80 GB, 17" screen. I reset the SMU, PRAM, NVRAM, and such.. no luck at all. I have no idea how to open the case, however I don't believe dust is a factor due to the machine shows no obvious signs of dust problems. (I could be wrong, but we have other Macs in the room that i'm sure are full of dust and they still work without problem.. even though thats not a good thing lol).

I've researched a little bit, and I think its the logic board. The machine, while I tried to update the system software (it's at version 10.4.6), it would not stay on long enough to update. I was unaware of this symptom. The machine would simply go into sleep mode, no moon light.. and I'd have to keep clicking the mouse to get it to wake up. Also, after I reset the SMU and such, the fan problems now start on startup, making me thing the issue is now with the machine itself.

Repairs, eh.. not in my department. I don't own the machine, and I'm not qualified to be physically repairing it.. just trying to get it in working state so that they don't have to send it out for repairs.

Thanks guys!