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Postagem original de: rdklinc ,

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Hi!  In addition to resetting the PRAM, I'd reset the PMU (with the machine off, hold the power button in for about 10 seconds, until you hear a tone and see the sleep light flash).

If I had to bet what the problem was, I'd guess it's a bad memory slot.  Try removing one of the RAM modules, power on, and if that doesn't work, move the module to the other slot, and power on again.  Aluminum PowerBooks are notorious for bad memory slots, and when there is memory in a bad slot, they don't power on, or they can sometimes act like yours.  I'd also do all of this with the battery removed, just to rule it out.

Good luck!

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