Macbook shuts off then semi-starts up on its own

when using my macbook the machine will shutdown. the display goes black, the light on the front of the case goes off and all sound (what little there is) from inside ceases.
then, a second or so later, the display backlight comes up to show a gray screen, the front led pops on and the cd makes its warm-up noise and the computer sits like that until i remove power from it.
this has happened sometimes when the book is just sitting there but more often if i am using it and pick it up or move it in any way.

errr...website just asploded on me when i hit "post"
anyway, i think i solved the problem. the ram needed to be re-seated.
which was odd, because it was just out of the box and apple-installed ram. although, installing the ram is a bit of a trick and it could have moved during shipping. at least i know its supported ram.
it tested fine after the re-seat but shut the computer down when tested before.
hope this helps anyone else who may have this problem.

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