Tried to replace RAM but now computer not starting...PowerMac G5 dual 2.0 - are my hard drives safe? What's up?

Hello - I tried to increase the RAM in my old and trusted Power Mac G5 (dual 2.0...2005)  tonight and now I'm in trouble. It has only 4 slots for RAM.  It came installed with 2X256 and 2X512 ram cards.  I bought 2X 1GB of Ram from Crucial.com after sending them the specs of my computer they assured me it was the right RAM.  I installed the RAM just how the youtube tutorials instructed....  I replaced the 2 256 cards with the new 1GB cards and closed up the computer......note:  I also "dusted" the inside of the mac very carefully and lightly with a barely damp rag.....
I plugged her in and the power button light immediately went on but the computer did not.  The button wouldn't respond to being held down either.   No sign of a startup or a fan noise. Nothing on the screen, no signal.... Nothing.....  So I tried reversing the order of the RAM, I installed the 1GB along with the 512's.  Nothing again, just the light turns on when I plug her in.  Then I returned the RAM to the original configuration.....again NOTHING...just the light on.
I reset the SMU.  (little button underneath the RAM area)  I haven't tried to reset the PRAM yet, but I'm pretty sure that will not work either as she is not starting up at all....just the light is on...  I didn't get a noticeable shock or static spark during the entire operation either. ****....whats up?
Are my Hard Drives safe in there?
Any ideas out there?  Thanks in advance to your advice, T

ToddMusic wrote:
note:  I also "dusted" the inside of the mac very carefully and lightly with a barely damp rag.....
Are my Hard Drives safe in there?
Any ideas out there?  Thanks in advance to your advice, T
Ouch!  That was not the way to get dust out.  Running that damp rag anywhere near an electronic component, even if you were wearing a properly grounded writs strap, was way dangerous.
Did you lay the machine on its left side when you replaced the RAM?  That is much safer (though the recommendation only shows up in the service documentation, not the user guide, for some reason).
What I would do at this point is to remove all RAM and try to power the machine.  If other stuff is OK, you won't start but you will see the lunar LED flashing in a repetitive pattern above the power switch.  If you don't see that happening, then things are exceptionally serious.

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