Stahlbrandt<p>Fixed a broken <a href="https://infosec.exchange/tags/Miele" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Miele</span></a> <a href="https://infosec.exchange/tags/induction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>induction</span></a> <a href="https://infosec.exchange/tags/hob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hob</span></a>. This is the KMDA 7774, manufactured year 2018. A nice cooktop with integrated extraction fan and flexible cooking zones. The glass panel <a href="https://infosec.exchange/tags/touch" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>touch</span></a> <a href="https://infosec.exchange/tags/sensors" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sensors</span></a> /#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 <a href="https://infosec.exchange/tags/PCB" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PCB</span></a>. 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 <a href="https://infosec.exchange/tags/conductive" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>conductive</span></a> 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. <a href="https://infosec.exchange/tags/DIY" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DIY</span></a> <a href="https://infosec.exchange/tags/repair" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>repair</span></a> <a href="https://infosec.exchange/tags/electronics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>electronics</span></a> <a href="https://infosec.exchange/tags/solder" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>solder</span></a></p>