Oddball question I know, but I can't find an answer to this specific question and now I'm paranoid that I may have somehow borked my PC worse than it was before.  I'll give as detailed of an account as possible, so please don't mind the length.  Here's what happened;

So my GeForce 8800 GTX's fan was making a horrible buzzing sound and every time I tried to run a game, even something graphics-light like Torchlight, the card's temp would jump up to a terrifying 77+ degrees.  Since the REST of the computer was running nice and cool and because of the fan's noise I figured it must be the card's fan.  Cleaned it, installed it back in, same thing was happening.  Took it out, decided to unscrew the fan to give it a really good cleaning...and managed to get a SCREW stuck inside the card.  Stupidity on my part, but doesn't change the fact that now my 8800 GTX is pretty much dead.   

Then I remembered that I use to have an 8600.  Asked a family member where she put it.  Found it...inside a box...without anything covering it.  Can't blame her, she doesn't understand computers all that much, but taking into account where it was left and that she probably didn't handle it properly it was dubious at best that it would work.  Still, I figured "what do I got to lose?" and installed the thing.  Turned on the computer.  Mobo lights up, but no boot-up beep.  Black screen.  Card's fan wasn't running at all.  Sigh.

And that's when I noticed that the CPU's heatsink wasn't spinning either.

Now for all I know this is what is suppose to happen, that without a graphics card the mobo doesn't start the boot sequence at all.  But I can't help but shake the feeling that now the CPU is screwed up as well.  This may be a simple question for you all to answer, but I would like to know sooner than later whether or not I'm going to have to buy a new CPU as well as a graphics card.  Also, as I understand it, most mobos give "warning beeps" when it is missing a particular piece of hardware/has bad hardware.  But the mobo doesn't make any sort of beep at all, at least not within the time frame I let it stay on (maybe a minute or two).  Here's a break down of what happens now when I turned on the computer;

-Mobo lights up, case fans spin, but there is no boot beep and the little boot code on the bottom right just displays a "- -"
-CPU heatsink fan doesn't spin
-With graphics card installed, I only get a black screen and the fan doesn't spin

And here are my specs:
OS: Windows 7 32-bit
CPU: INTEL Quad-core 2.66
Memory: OCZ Gold 4 Gigs
Mobo: nForce 680i SLI
PSU: BFG 850W
Graphics: Dead 

Will provide more info if needed.  Again, may be a simple "yes' or "no" answer, just would really like to know.  Thanks in advance.

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Now for all I know this is what is suppose to happen, that without a graphics card the mobo doesn't start the boot sequence at all.

Do you have onboard graphics?

Does the 8800 GTX still work even though the fan is stuck? If so, then you know your mobo and CPU are OK.