MacBook Random Shutdown
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The only solution is hold down the power button when booting until you hear the loud sound indicating the system is locked to 1 Ghz, then the machine boots fine and no shutdowns. I have no explanation for this.
Otherwise my machine will rarely finish booting up, often shuts down, and shuts down during sleep. With this trick (I found on the Apple discussion forums) it works but I did not pay $1000 to have the MacBook run at half speed.
MacBook 1.8 Ghz, White, 2GB RAM from Crucial, sent to apple twice for repair, complete waste of time whatever they did was not helpful. Still has problems.
