New Imac 24 inch wont start up

Hi
I just got my new 24 inch imac 2 weeks ago and suddenly it started making weird clicking noises while the screen saver was on and wouldnt respond when i tried to move the mouse or input something in the keyboard.
So i pushed the power button until it shut down. Now when i try and start it up it starts but doesnt even get to the part where the gong sounds and then nothing else happens. basically the screen is black and that white sleep light comes on and stays on. I can hear the hard drive spin up so i dont think that is dead. Im guessing the logic board died.. Anyone have any suggestions before i call apple? anyone had the same problem? thanks for any feedback!
Dan

Ok that was a scary moment. i figured out the problem. the imac is alive!
I added more RAM this morning and actually when i first put it in the same thing happened, it wouldnt go pass the opening gong sound, but then i tried to push the RAM in more snugly and it started up ok. What i think happened is the RAM became loose and fell out of place as it is facing downward.
Now, has anyone else experienced this problem? And i found that it was hard to feel when the RAM is actually in place. There is no feeling or clicking sound. Anyone added RAM themselves and found it hard or has it fallen out of place? Should i contact apple if this keeps happening?
And as this happened, has it damaged my computer? As its like someone pulling a piece of hardware out while the computer is still running right...
thanks for any feedback!!
Dan

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