Fixed a broken #Miele #induction #hob. This is the KMDA 7774, manufactured year 2018. A nice cooktop with integrated extraction fan and flexible cooking zones. The glass panel #touch #sensors /#buttons started to fail, with problem to set levels, to turn the hob on and ghost turn-off while cooking. After disassembly, soldered all contact surfaces of the conductive rubber buttons residing under the glass, snapped-in on the #PCB. Had to snap each button off, and they were many! SMD solder iron too small for proper heat, but a regular sized WTB tip on the Weller station at some 400 deg C worked fine, using a desoldering pump to remove superfluous solder. Each pad is a via and even if looking pristine (no fog on the PCB, no visible oxidizing) it was enough resistance to become faulty. Believe this to be #conductive sensors and that the via size and/or thickness was wrongly designed. Might even be an issue with the design recommendations of the component supplier and not Miele. #DIY #repair #electronics #solder