I recently completed a small power supply with a speaker protection circuit combined with it and accidentally installed the IC chip UPC1237 backwards on the board. The power supply section was fine but the speaker protecion aspect of the board does not work.. There is no delay and the customary click is not present. I have a replacement UPC 1237 and now know the correct pin out, my question is have I damaged anything in doing this and how do I troubleshoot it. ? Thanks for the time Wayne