Why won't my MacBook Pro start up at all?
I had bought a used 15" MacBook Pro, with the belief that it just needed a new battery. I installed Mac OS X Leopard on with no problem while it was plugged in, and it turned on numerous times. It now won't turn on anymore. It can't be the power supply, because I just bought a new power adapter, and as some of you know, the Pro doesn't need a battery as long as it's plugged in to boot up, but it doesn't start up AT ALL. Help?
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