Got a brand new Compaq Presario SR1510NX; 80 gb hadd drv, 512 pc 2700 ram, ointel celeron d processor. When I first put it on went off after bout 2 seconds and restarted. It keeeps restarting erery 1 to 2 secs. Haven't even been able to see the post screen. Checked power supply and ram but all is in order. Ever came across smtg like that?