Aurora R4, No Post/Beep/Video/keyboard lights

Hi,

I'm really hoping someone can lead me in the right direction with a problem that I have with two Alienware Aurora R4's that power on with all fans running, but do not post, with no beep(s), nothing on screen, and keyboard does not light up. 

I had been using an R4 for about 3 years without any problem. Specs (GTX970, 32gig ram, 1T HD). A week ago, I restarted and it wouldn't Post. I did everything recommended on forums which was primarily, remove graphics card, remove all ram, remove harddrive and boot. As a result of doing this, I get 2 beeps - which I'm told is a good sign as it means CPU/Mobo is functioning. Its then recommended to seat 1 ram chip in dimm1 and boot without graphics card - which I did only to have the same problem: no post, no beeping, nothing on screen, and keyboard no blinking. I also removed the cmos battery, did the pin change, and drained the power by holding down the power button for 30 seconds. 

So being under the impression that I had a dead processor, or even a mobo connection gone bad, and also not wanting to install a new motherboard - I bought a used Aurora R4 for cheap which arrived earlier today. I did this instead of getting a newer Alienware, or even a different brand all together, because the harddrive that was in the older R4 has way too many programs that I would need to reinstall (and to be honest I've just gotten used to the R4. So, right out of the box with the newly bought used R4 - it booted to the new hardrive and into windows with no problem (of course). Then, I replaced the harddrive with the old one with all the programs - and it booted right into windows with my 3 year old desktop with no problem. Then I removed the graphics card that was in the new computer (GTX-220) and replaced it with the graphic card that was in the older R4 (GTX-970). Again, no problem - booted right into windows with no need to install new drivers. 

Next was the ram. The new computer only had 8 gig of ram, so I replaced it with the 32 gig of ram that was in the older computer. The new computer would not boot - no post, no beeps, no video, no keyboard blinks. So I immediately thought that maybe the newer R4 couldn't handle that much ram (for whatever reason) or even that maybe one of the sticks was bad. So - I removed it and put back in the original 8 gig of ram that came with the newly bought used computer. Still, no post. So I put back the original graphics card - still no post. Finally I put back the original harddrive - having all the original components as it was out of the box. Still no post, no beep,no video, no keyboard lights. So now it is behaving Exactly like the older 3 year computer.

I also tried 1 stick at a time on the new computer, and also took out the cmos battery and changed pins. Same problem. I can't quite see what I could have done to damage the mobo or cpu on the new R4. If you put ram in a computer doesn't like it - it should just give you 2 beeps. And normally - if you put a graphics card - that a motherboard doesn't like - it'll let you know. And even that doesn't add up because as I said, it booted fine with the better graphic card in before the ram change. 

Anyone have any thoughts or ideas. I've got two R4's that won't post and are acting exactly the same. The fact that the newer one booted fine right out of the box,and with the new harddrive, and with the better graphics card..., But then suddenly stopped Posting when I put more ram in is bizarre enough. But changing everything back to the way it was and still having the same problem is even more bizarre.

Thank you to anyone taking the time to read this.

Mike Clever