I replaced my motherboard with one of the exact same. The install went well. All the connections are correct. I triple checked it all. The computer is a Dell optiplex 760 SFF. w/windows 7. The old HD is OK, The power supply seems to be OK. at least it powers up when I hit the reset button. The front panel On/Off button seems to be working because it will shut the machine down when I hold it pressed in. But, that's as far as I can get. When I try to power it up from the front button, the only thing I get is a green blinking #3 diagnostic light that goes out when I release the button. It'll power up when I hit the rear reset button but the front button shows a solid amber light and won't go any further. Total black screen. Maybe I just got a bum board. The sellers description was that it was booting up to BIAS just fine. Any ideas, or should I just walk over to the scrap barrel and drop it in?