I did not do this repair until now, but I'm quite sure, there is a microswitch, which has to be replaced. Another possibility: replace the PCB. I found a used one for you at [link|https://www.ebay.de/itm/195567811936?var=0&mkevt=1&mkcid=1&mkrid=707-53477-19255-0&campid=5338268676&toolid=10044&customid=CjwKCAjwh8mlBhB_EiwAsztdBOxToNk5DywUAqqiliXzPj75c0hMF3dSDg5TrpQSmAc28mX8v9ceERoCxSgQAvD_BwE|ebay|new_window=true].
Use this [guide|123975|guide] to open the Caffeo and have a look.