Ring Video Doorbell 2 won't connect to inside doorbell

My Ring Video Doorbell 2 suddenly won't connect to the inside doorbell. Tried to open and adjust the diode / wiring, it worked if I gently pressed the diode with something e.g. screwdriver. But if I put it back and press it as normal, the inside chime won't ring again. It used to work before for more than a year.