You are correct - it is the entire green card that you should re-seat. The name of the card should be on the plastic tabs that lock the card into place. If it's the Iwatsu-VS, which comes in an off-white cabinet, then it's a little trickier to get the card out and in again, and there are no plastic tabs. It will be in the VML slot. If there is a dealer in the area, you may feel more comfortable leaving that up to them, but as long as the system is powered down and you handle the card carefully, you should be okay.