Hey I was experience this problem with my ASUS and actually came to this forum looking trying to figure out how to solve it. It turned out that it was because the hard drive wasn't connected. I had actually taken it out while trying to fix a different problem and had just forgetten to put it back in (air head moment I know).
I don't know why your computer isn't working but to see if this may be your problem go to the "Advanced" tab and select the "SATA Configuration" option. Once your here, look at your Serial Ports. One of them should be your hard drive while the other your CDROM. For me, the one that was supposed to be the hard drive was not there. The pic below shows what my screen looked like. As you can see there's nothing for the first port where my hard drive should be.
This is is actually how I figured out what was wrong instead of seeing the hard drive on the other side of the table lol
I don't know if this is your problem but I'd say it's worth checking out and if you don't seeing anything for that first port, maybe this is your issue as well. And assuming you didn't take out your hard drive and forget to put it back in, it may have came loose or is having a connection issue of some kind. I hope this helps.