|I was hoping that it was just a case of changing the connectors to the motherboard....ie using a screw driver to find which pins are the I/O.|
Not familiar with your board or case but some cases have more stand offs than you may need. If there is an extra one, it will short out the board. They are usually easy to remove.
Usually boards are bench tested. placed on a non conductive surface...and then powered up. it's easier to fiddle with the connections and saves from installing and having to remove from the case should things not work.
If the board is still in, loosen all the screws..wad up some news paper and tuck it under the board. This will prevent it from making contact with the case and free your hands.
You don't have to remove the screws, just loosen them enough to raise the board a bit.
The above is just for testing.
It might save time to just remove the board and make sure
there are no extra stand offs.