an additional point
by billyBust8 - 10/30/09 10:55 PM
In Reply to: The computer does not boot when upgrading your RAM. by alza68
often computers do not handle mixed size RAM sticks. that may be why yours worked with either the 512 MB or the new big one alone, but not with both together.
the manufacturer's site usually has info specific to your system model that outlines restrictions like this.

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