First, I got this:
PXE-E61: Media test failure, check cable
PXE-M0f: Exiting Intel PXE ROM.
So I went into the boot options and disabled the network adapter. Got rid of that error, but now on the top left and bottom left of the screen there is a blinking underscore and a blank screen, and the screen flickers. It will not boot off of the cd rom. All i can access is the BIOS. Please help me out.