Hi Mike,
That is not a good sign when you don't get a post beep or the motherboard not beeping when the memory is taken out. Put one stick back in and be sure to check which slot to use for one stick only...would be in your manual. Then, take that out and try the other stick. If nothing, then put them back in in the same slots that you took them from originally.
If that does not work, clear the CMOS either by taking the battery out or using the jumper method. This is a very, very long shot, but worth a try.
Tell me about your power supply, like brand name, watts, and amps per rail (found on the side of the power supply) Also, is the fan spinning on the video card? Are you certain the CPU fan is spinning? Are you certain the CPU/Heatsink clamp is still down tightly? Does the monitor light up or come on even though you don't get anything with your drive....like does it stay black, or stay white and turned on?
PS: Won't harm the button for this troubleshooting segment.