hi, few things to try. firstly does it come on when u remove the DVD drive? *EDIT sorry just saw at end of message u already tried this...(working too much
), secondly does it require a PCIE power plug to function, and if so is that still plugged in or was it pulled out accidently when u stuck the new drive in... finally, and this happened to me. If you need a pcie psu plug for the card to function, and ur power supply doesnt have a built in one, ull need to use an adapter, now what i did was attached the adapter to the psu but i also tried to run a DVD drive off it at the same time, cudnt get enuff power to run so my drive and card failed, so now i have the pcie on its own dedicated molex plug, and nothing else running from the same cable and works fine. Sorry hope that made sense?
oh and make sure the card is bedded properly in the motherboard as well