Just got my shipment from tiger direct of an AMD Phenom Quad Core CPU 2.3GHZ, ASUS M2N68-AM SE2 motherboard, ATX Mid Tower case with 450w power supply included. My issue is, after connecting everything and screwing the mboard to the tower and plugging in the power supply, when I turn on the machine it stays on for about 4 sec's then goes back off. Its not even on long enough for me to see anything on the monitor. I rechecked all the connections to the best of my ability (the tower/powersupply combo didn't come with any manual or instructions so I can only refer to the mboard's manual). Any ideas why my new system isn't staying on?