I download lion via the app store to install on my Mac Mini(2010). I read instructions on how to burn it into a DVD. I burnt the DVD. I backed up by existing OS using Time Machine and Carbon Copy Cloner(just in case). Then proceeded with installing Lion. Where i wiped my hard disk clean by partitioning it again with Mac OS Journaled file system. After a long time it threw an error and said i have to restart. Tried many times and same thing. So i thought i have a corrupt DVD and hence i thought i will install the Snow Leopard DVD and atleast restore it from backup, yes i wont have Lion but will have a working Mac right? Now all i got was gray screen. Nothing happened. Tried every trick like resetting NVRAM etc.... Then hooked up a Mac Keyboard and tried again and this time i get a dark gray screen which is multilingual and says i have to reboot again. Tried many times same thing. As a last resort, removed the 8 GIG mushkin RAM and installed the default 2 GIG RAM that came with the mac and tried again. Same thing.... Have an appointment with the geniuses at the local mac store. I hear its a hardware failure from what i have read so far... All that because i tried to install Lion? Of course the Mac was on all night as it was doing the back up.... Any ideas ?