I have a new Asus AX4B-533 that I've just installed today. The machine will not post. The system fans (heatsink, video card) will power up and run, but there's no activity from the HDD and I get nothing onscreen. There are no beeps on startup, as there would be, I think, with a bad RAM configuration. \r\n\r\n\r\nOther relevant information:\r\n-The CPU (2.4 Ghz Celeron) is also new.\r\n-The power supply (433 W) is new as well. \r\n-RAM: 2 x 512 MB DDR\r\n-I've removed the HDD and tested it in another machine to make sure it is still functional; it is.\r\n-I've tested two different video cards in the AGP slot, with the same result (or lack of...) from each.\r\n\r\nSuggestions, please?