I have a Sony Vaio NW-240F laptop. I have tried everything and it wont load the OS. I was using it and it just went into shut down mode on its on. I restarted it and I see the vaio logo, then a black screen with a flashing line in the top left corner. Thats it. I went into the bios and it shows the hard drive has 320GB. I used the F10 button to run the diagnostics and also used the fix any errors box but it didnt not show any problems. I then did a complete system restore with no problems or hang ups during the install. It then reboots and back to the same black screen with flashing little line. The F8 button does not work. When I first turn it on, the power, battery & HD light all come on. The HD light flashes till the logo comes on, then nothing. It also flashes when I am running diagnostics or doing the install and I can hear it running with no strange noises. I have also reseated the hard drive and the memory. Does anybody know what else I can do? I really need my laptop for school. Thanks!