If the PC is on, but you're just not getting any signal, and it was working before, it may have been a BIOS update.  The BIOS update for DSC has been doing this to people connecting via displayport.  If you're using a displayport cable, try connecting via HDMI instead and then seeing if you can boot.   
Okay hi, I want to first start by saying I'm extremely new to computers and this is the first time I've ever purchased a computer for myself, nevertheless a gaming one.  So, my Aurora R12 came in a few days ago, everything was fine when I started it up, worked like a dream. I began installing some applications (i'm not sure if that's an oopsie right off the bat but :(). I left it on overnight because it was still installing some stuff as I was about to sleep.  Something to note is that right before I went to sleep the pc started blinking with a orange or "amber" (as I've now found out) light. I know that's pretty bad news right off the bat but at the time I didn't think anything of it. I didn't count the number of blinks or anything but it was a fair few.  It turned back on fine after that though, so again I literally didn't think anything of it and went to sleep. Well, this morning I woke up and noticed my computer was off. A little weird but I thought, whatever it might just automatically shut off after a certain amount of inactivity.  When I tried to turn it back on however, the Alienware head didn't light up at all, and my monitor lit up briefly and I saw something about "Alienware repairs" or something before it turned off. I tried all the fixes like taking the power cord out and pressing on the power button but none of it worked. I'm really certain I need a replacement or something. I can actually hear my PC running though, that's the weird thing. It's definitely not my monitor or any other cord I have plugged in either.  My father is actually a computer technician so I'm probably going to get him to look at it before I do anything else, but is there anything anyone can recommend that might be a fix to solve this issue? Does anyone know why I can hear the PC start, but the power button doesn't light up and the screen goes black? It's really stressing me out, I payed so much money and after the first day I'm already having so many problems. Feeling a bit helpless.  Sorry this was super long. ANY HELP WILL BE APPRECIATED
Aurora R12, won't power on