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If you're sitting there staring at a blank monitor, here are some thing to try:
• Check all your external cables, to be sure everything is snug.
• Check your power source.
• Try restarting with Extensions off (hold down the shift key). If it restarts OK, you can suspect an extension conflict.
• Try restarting from a CD or emergency startup disk. If it starts OK, then you may have to re-install your OS.
If nothing is helping, you can also try these inside-the-machine checks, assuming you are comfortable with the internal workings of your Mac:
• Check all internal cable connections
• Reseat your DIMMS (or SIMMS or whatever you have for RAM)
• Reseat the processor board
• Check ALL your cards to make sure they're snugly in place
Another thought would be your motherboard battery. If it is not properly seated, or dead, you machine won't boot.
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Heidi Splete |