I am attempting to install Ubuntu Server on a dell XPS 420 that has no OS and is wiped clean.I have burned a disk for the server to boot from and it brings me to the installation window after selecting the language and hitting install 1 of 2 things occur. 1. the server reboots and takes me back to language select. 2. I get a black screen aside from a flashing underscore in the upper left hand corner like it is waiting for my input, but is unresponsive. How can I get the OS installed?