Yesterday I upgraded from 13.04 to 14. During the installation, I left - when I came back (a couple of hours later), it showed a black screen, nothing else. Nothing happened for about an hour, so I restarted.
Now, when I try to boot my computer, it gives an error: No bootable device
I can run Ubuntu from a LiveCD, but I can't reinstall Ubuntu. It doesn't find my original hard drive, just the usb drive.
Similarly, if I Try Ubuntu from the USB-stick and run gparted, it only recognizes the USB, but the hard drive is not visible.
Anyone have any ideas how to get Ubuntu to recognize my hard drive again?