Since nobody else has posted, I shall do so. By bridging two components together, and then applying power, you have most likely fried something on the analog board. Since I have limited hands-on experience with the insides of a compact Macintosh myself, do not take my word for it, but that is my initial thought. It might be a more sensible decision to simply acquire another compact instead of working further on your Classic II. Let this be a lesson to you in the future though - be less curious and take more time with repairs. It might be useful to let us know which joints you bridged.