I have a HP Pavilion dv9815nr, when I push the power button the panel lights light-up. The power indicator lights up. The cap and num lock do not light up. The PC will power on for 1-2 seconds then powers down then repets over and over until I pull the plug. I hear the fan run. I have reseated the memory and changed around. I pulled the battery and pushed the power button for up to 60sec with no change. Is it the cpu??