No Entry sign on start up screen goes dark when I use utility disk

HELP!!!!
Everything was fine no strange noises or bad behavior but when I started up my MacBook Pro I get a "No Entrance Sign" (or what-ever it's called).
I have unplugged all the peripherals (external drives, monitor, etc) but to no avail.
When I tried booting from a Utilities disk (Disk Warrior) the screen went dark and I could not see the instructions (it was there but very dark and dim).
Is there anything I can do or am I doomed?
HELP!!!!
Thanks.

Er, it looks like a "No Entrance" sign. It's OK the cats at The Genius bar understood - they call it a "No Entrance" sign too. It basically means you're screwed and need to get a new internal drive. Luckily I managed to make a rushed back-up so things are not too severe (just expensive).

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