Hello to everyone,
I have the very similar problem with my new laptop Samsung NP3005CXXXX with Win7 pre-installed. I install ubuntu and after that the laptop is bricked. In fact, I decided to install ubuntu using all the hard disk what means that I was not expecting to have a dual boot. Now, neither linux nor windows is working and the screen is always blac. Could some one give me an advice? I don't know if I could do something with the warranty service.