I brought 2 of these off ebay from the same company. One of the expanders works without any problems but if I swap out the first one with the second one it does not work. I tried the board with just power, a green and an orange LED light up then the orange one goes out leaving just the green lit. By contrast the one that works clearly goes through a full POST with much LED activity. Being convinced that this board was faulty I obtained another through another supplier and this too only powers up with the green and orange LED's ,the same as the other "faulty?" board. I have read online that some of these boards are locked to IBM servers. Any help in getting to the bottom of this would be greatly appreciated. I don't want to buy another as I am not convinced I have 2 out of 3 faulty boards.