IMac 27" i7 won't turn on. No disk activity.

Ive seen some similar dicussions here but none that are exactly like what happened to me.
The big problem is my iMac is stone cold dead. I push the power button and nothing happens, no disk activity, no fans, no nothing. As if it had been un plugged.
I dont know if it could be related but I was sing Boot Camp. I created the partition, it asked for the windows disk, I put it in. the iMac restarted, I got the chime and the gray screen (no apple logo). I was expecting the windows installer to start up, no luck. The iMac was on the gray screen for several minutes, then the apple logo appeared and then I got the log in window. I thought it was strange so I restarted and held down the "option" key, I got the gray screen for several minutes again. I then got the boot menu where I could see "Macintosh HD", "Bootcamp" and "Windows"(DVD). So I booted with the windows disk thinking it would start up the installer. Several minutes went by and it was still on the same screen. Then it restarted by itself, I heard the chime. Mind you, I had unplugged all the external hard drives I had and what not. So I pressed down on the touch pad to eject the windows disk. The disk ejected and the iMac got stuck on the gray screen for several minutes again. It restarted by itself. I thought I would leave it to boot all the way into Lion again. This time the gray screen didnt go away, I waited for over 20 minutes, got frustrated and pressed down on the power button for a hard reset. I powered on again, got the chime, then I got a black screen with white text saying it could not find a boot device. So I thought I would restart and hold down option key to boot from "Macintosh HD". I powered it down, and it never powered on again. That was it. No Hard drives spinning, no fans runnig, nothing.
I checked the outlet, plugged the iMac to a different outlet, checked the power cable, etc. It all seemed fine.
I reset the SMC, several times in fact, and nothing.
I even opened the Memory Access Door and removed and put back the memory cards. Not sure why, but Im desperate.
So Thats it. Im gonna take it to the apple techs but I thought I would get some comments from the community. Any ideas??? . Any help is appreciated.
iMac specs:
3.4GHz Quad-Core Intel Core i7
16GB 1333MHz DDR3 SDRAM - 4x4GB
2TB Serial ATA Drive
AMD Radeon HD 6970M 2GB GDDR5

Sounds like a failed power supply. Because the machine is covered by warranty take it into your local Apple Store or AASP for service. Make sure you book an appointment first. You can try doing a SMC reset and Pram reset first but I don't think they'll work.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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