HDD of my Mac Mini (2011) died. I wanted to install Ubuntu on it -- single boot from a USB. So, I replaced the HDD with a working disk and created a bootable USB drive as mentioned here: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-ubuntu
When I boot the machine, it waits about 30 seconds to show "try Ubuntu", "Install Ubuntu" menu. No matter what I select, the screen goes black to never come back.
Can someone tell me how to get around this issue?