@helmuteke said in Unkown Touch switch PCB : How to make them push instead Toggle: ATMHK218 From google this looks like a serial eeprom. For the other chip if it has no writing then it's impossible to help, especially when the picture is in such low resolution. My guess is the HTTM sensors have no resistance soldered so there is no way to change it unless you remove them, add the resistance and put them back...