Hi, unfortunately my hard-drive is somehow now broken and I have important Data on it. Well, I wanted to ask if it is possible to somehow still recover the Memory, so I can still et to this Data.
While booting it says either that it can't find the hard-drive or it boots into grup and there it can't find the hard-drive. I also tried to boot with a ubuntu live-cd and then recover there the memory with GParted and that also couldn't detect a hard-drive.
Please help me!

No, I didn't.....

I checked cabels, all I did was to run  skype and then suddently evrything froze, i couldn't even shut down the pc vie CTR+ALT+PRINT R I S U B (just works on a linux cernel)
EDIT: jimbauwen helped me out on IRC and it seems to work again, thanks a lot! It seems that my CD drive currupts the pc while booting......