I am facing quite the predicament. The computer I am currently using will not boot because, as the title says, there is "no boot device found." When I check the BIOS settings, however, the HDD is recognized under the "Drives" menu. The only problem is that it is not recognized in the list of boot devices.
I have tried to change settings, but there is an unknown Administrator password in place. I tried removing the CMOS battery, messing with the jumper, etc. all to no avail.
This computer has had a problem with an HDD before. When I first came to own it, the hard drive was simply broken and useless. The one I am currently using is fairly new. (I installed it at Christmas time, 2012) I haven't had any problems with it until now. There is a Windows 7 installation on it, and I know it works. It was operational only just last week.
A few more tidbits of information about the machine:
BIOS revision: 2.4.0
HDD: Barracuda Es.2 SATA
I would greatly appreciate suggestions anyone might have about getting this thing working again. (Removing the BIOS admin password would be a bonus.) Why is the drive recognized as a working device connected to the machine's interface, but not as a bootable device when there is an OS installation on it? Once again, any help would be most appreciated.