funny this thread is up because my compaq just about died( i'm using my dads dell right now)

I have system commander installed on it and the first thing i noticed was it wouldn't let me boot into Linux.

Now when i boot it says "Could not find operating system on any devices"

I checked the bios and it isn't even detecting my harddrive. It only detects my my DVD drive and CDROM drive. Even when i ask it to "detect devices and exit"

what is going on here? I probably should open it up to see if someone took out my linux hard drive first. BRB