Hi,
Make sure you read the directions, look at the illustrations very carefully, before putting it on. If you miss by one pin, then you cannot only destroy you subway, but you could also destroy your A1200. In other words don't get in a hurry to put it in and try it out, it could lead to disaster. This I know from experience. When the smoke gets away from your electrical components, the electrical item quits working.
smerf