Static noise and trouble booting

I have a powerbook 15"1.67 GHz High-Rez that will freeze very soon after or during start up.

I have heard static noise from the speakers just before it freezes up. I have made it thru start up and log in before it freezes and other times it freezes before or during launch. I have not been able to boot from the start up disk, it takes to long and the mac locks up before boot.

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Try starting from just one RAM chip and reseating your RAM.

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Just tried your sugestion of one chip then the other still no luck. I can get it to boot but it freezes up in in a minute or two.

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Sometimes it will not even boot. I will hear a static noise and it will freeze.

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Try starting it in target mode using another Mac or starting up from a known good external disk drive. Try starting holding down the "shift key". There are to many variables to give you a clear cut answer.

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Target mode froze up after a minute and not able to boot from an external drive.

Now it will not boot at all.

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Remove the hard drive and try starting from the CD with your system installation disk. Has anyone been into the machine? How hot is the bottom getting?

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