I am having the same trouble with the same component, and have not had any luck in solving the issue. Although I am new to this forum I have to admit, I am not impressed by either of the two posted solutions to this problem. Neither of them has a clue, it has nothing to do with the ribbon at all. The problem lies in the power transformer which causes the relays to continually open and close, which is the clicking sound you hear, I know this because I own one, and have taken it apart far enough to physically see it while it is happening, and you do not even have to have the ribbon attached at all to do this. Now, how to solve the issue, I do not know other than replace the power transformer, which Kenwood no longer carries unfortunately. If anyone has any intelligent suggestions I would love to hear them as this is a very nice little system when working. Would be a real shame to have to scrap entire stereo because of this one issue. I'll await any response. Or email me at : elixermixer@q.com
Thank you.