Powerbook G4 getting HOT under the collar...

I have a PB G4 1GHz 15" Aluminum, it's about 4 years old now, and for some time, it has been getting hotter and hotter. I use Temp Monitor to watch the temp on the processor and I notice that whenever it reaches around 140 degrees F, the whole computer freezes, and I can't do anything except do a force shut-down. Once it cools down, it works fine again, until the temp goes back up. It happens a lot when I play games, or import lots of photos in iPhoto, basically anything that uses the processor rather heavily. It didn't used to do that, and it didn't used to get that hot, either. I have had it apart and I've checked the fans, they are clean, the exhaust fins are clean, and the fans do run, as I can hear them, but maybe they are slowing down? Or is it just that the processor is getting old, or I just don't know... Any opinions or ideas???

Your Energy Saver settings, under System Preferences, allows for the CPU performance to be set to Automatic, Reduced, or Highest.
Possibly, with the increased graphics requirement and a change in one of these settings, could put you over the edge.
It is not a good idea to continually force a shut-down like that, imo, and you will be better served by quitting things you don't need (like the temp monitor which increases the load by itself) , reducing your settings, and elevating the book (especially during the summer months) to allow the dissiapation to work.
They will get hot doing what you describe.
Joe

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Powerbook G4 getting HOT under the collar...

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