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PowerBook G3 Lombard crashes using Mac OS X

I have a Lombard G3 PowerBook 400 mhz with 30 gig hard drive, partitioned with OS 9.2.2 on one side, OS X 10.2 on the other.
PC card for one firewire port.

It crashes when it gets a little too taxed by programs like Photoshop or is downloading software updates. That isn't good cause I have to do a total reinstall then.

I ran Memtest, a unix based ram tester "http://www.memtestosx.org/" and discovered the original 64 mb was bad and took it out. That left the machine less prone to crash on Photoshop start-up but that was about it.

The remaining 256 mb runs with flying colors using Memtest but the crashes continue. All I have to do is run Radial blur in Photoshop and it is toast.

I was told by an authorized Mac tech guy that some other component is bad on the laptop and needs to be replaced. He said it is a hit or miss to do this. The Unix base in Mac OS X does not like any components that are not running perfectly.

Is there a way to test the other components? Any other options would be helpful. Thanks in advance!!

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Collapse -
Try cleaning...

In reply to: PowerBook G3 Lombard crashes using Mac OS X

The heatsinks of whatever parts that have heatsinks. I try compressed air first, then open it and want to see a spotless interior.

Heat bad... clean good.

Ogg.

Collapse -
Not much dust

In reply to: Try cleaning...

I've had the keypad off this PB and the only heatsink I see is this sheet metal and wire shield. Didn't find an dust so far. Need I take it apart more?

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