For two or three years I've been running Ubuntu on a Toshiba Satellite A215, AMD 64 dual core, 2gb ram, 160gb hdd (currently loaded w 12.04). The computer crashed during loaded, which may or may not have been related to a dead battery caused by bad connecter on the powercord (since replaced).
I've been unable to boot ever since. When I let it boot, it shows a grub screen offering me the opportunity to choose Ubuntu, Memtest, etc. As soon as I touch a key, it freezes. I tried to boot with an Ubuntu 13.04 install disk, but it doesn't work. I tried with an ubuntu repair disk, which seems to open properly, but it freezes when I hit a key (say to choose English.) If I let it go without choosing a language, it goes to a blinking cursor that stays in that position indefinitely.