I'm debating on whether to wait for it to arrive next week
Sounds like you've tried practically everything in so far as swapping out parts. So....
Assuming you're getting no POST screen and no BIOS Beep Codes, and you're certain you have everything plugged in correctly, personally I'd be moving ahead with the RMA as quick as I could. While happily not yet all that common, you can and do get one that's truly D.O.A.
Besides I don't think I would want a board that required a PS2 keyboard to POST and just laid there lifelessly without an error visible on screen or no audible beep codes. Most boards that I've seen will at least POST without even a keyboard attached, they may halt on keyboard error but at least they'll inform you.