My HP pavilion dv1100 laptop will not boot up. When I turn it on, the HP logo shows and it freezes there. The HD makes clicky noises, and after about a minute it goes to a blank screen. Sometimes if i push the space bar during the blank screen, the message comes up "Operating System Not Found" I have tried reseating the hard drive and the ram. It will not boot from a CD, and it freezes before I can get into the BIOS. Is this a mother board problem, or can I solve it by getting a new hard drive?