I have a similar issue with my IHKR. Anyone got a used one for sale?
I want to have a back up before I dissect mine to resolder or replace the capacitors. At the LKQ these units are rare and the IHKA is one of the first things to get taken. On an e36 board someone did the capacitor replacement and got new life out of theirs. The dial components are not integrated into the electronics according to the photos so I don't know how serviceable this is going to be.