Inspiron Hardware problem

Hi Experts,

 I am using dell inspiron N series laptop, I am facing a problem with my laptop. If i want to start my laptop it is showing error like " UNKNOWN FILE SYSTEM 

CRUB RESCUE ". After that i tried to load another OS also but it is not responding.

             Can any one one tell me how to solve this problem, or i have to go dell service center.

Thanks in advance.

CHAKRI......