magic 3.5 installed but only power on works

[blooper]

anybody able to give me a guide as to what could be wrong .finished installing the magic 3.5 but although the powrlights come on and i,am able to ejct the tray no sound or sign of life ,no whirring ,nothing!.dosent even go to the startup screen with no disk in placeone thing i did notice was when i used the tester on the clip board the last pin (ground) on the link cable to the magic board didnt light up , but all the marked letters did when tested ,is this normal? any help greatly appreciated!!