Black screen with white blinking underscore

[booster6699]

Hi friends, I bought new Samsung 300E5C laptop, when I installed window 7 on the fresh device it worked perfectly alright. when I switched on my laptop on next day black screen with blinking underscore appears. then again I thought it might be os prob so I installed again, after reboot it shows me a same error. any suggestion friends.

 

[Tmagic650]

The laptop can't find a boot device. Check the boot order in the bios and make sure that the hard drive is in the list, either first or right under the CDROM...