i have these copper "spacers" or some golden brown metal
That's what I meant by the metal studs, those are made of brass I believe because I think that is a non-electrically conductive metal...well not completely NON...but less conductive than copper. No there doesn't need to be any paper washers between the screws and the mobo..should simply go on the studs and screw goes in...
Well.....to troubleshoot your computer to find the problem you have to do this: (BTW: You never answered...do you hear any beeps at all when you try to boot it up? Does ANYTHING at all happen? or is it just that blank screen with orange light like you said)
Take the motherboard COMPLETELY out of the case....you need to rest it on something that will 100% be non-electrically conductive...hell if you can put strings through the holes and have it hanging from the air then there you go...but anyway....get the motherboard out...put in ONE stick of RAM...the Video Card....and plug in the keyboard...and see what happens......if your computer POST's and you're able to get into the BIOS, then it looks like it's something to do with your hard drives or cd-roms.....but I doubt that'd be the problem..but ya never know....
If nothing still happens...then remove that RAM stick.....if your computer then beeps upon trying to turn it on...that RAM stick is bad and is what kept your computer from booting up or doing anything for that matter.
I had switched out mobos...and a hair had layed down across the RAM slot...I didn't see it...put the RAM in and so basically of course the hair was pushed in with the RAM and my system would NOT boot....same thing..no video signal, no beeps no nothin....upon reseating the RAM and getting rid of that hair it booted up no prob.......
You've swapped out video cards I know, but still like I said you basically gotta remove a part one at a time until you get something out of your computer and you can figure out what the problem is.