Do you have another computer to test the disks in?
If you can get to the bios, you should be able to boot with a known good drive and a known good media.
You used something that gave you the choice of "burn from iso" correct?
If you look at the cd on another computer you see multiple files and folders rather than just one filename correct?
I don't mean to imply you don't know what your doing, but your answers have been perhaps unintentionally ambiguous.
What model Dell do you have. I have fixed computers for 20 years and have several Dells here on my bench both laptops and desktops. I have never seen one that could get to the bios without being able to boot from a known good cd and drive.
But if it is a Dell 3000, you will find a half dozen of your fellow owners on the last three pages of this forum.
Does you dell still have the diagnostics partition? http://support.dell.com/support/topics/glo...;l=en&s=dhs
If you cannot see anything on your display, you can hold down the mute button and press the power button (instead of F12) to begin the Dell Diagnostics. You do not need to highlight Diagnostics and press <Enter>. The computer automatically runs the Pre-boot System Assessment.
there are a couple of models that don't have the capability to choose diagnostics from the f-12 menu. Firmware update fixes them.