There is a flat cable connecting the touchpad and the logic board. A part of it is viewable when taking out the battery (see pictures at the end of this post). I've torn 2 lanes on the left side while replacing hard-drives and now the Macbook doesn't boot anymore. Needless to say I'm not very happy about it... Is there some way to replace this cable (and where could I possibly get it). If it's not possible I might be forced to replace the entire upper case. I heard Apple charges 500 for it. So any help with this is highly appreciated.