# Need help for saving a Model 01 (soldering)

**URL:** <https://community.keyboard.io/t/need-help-for-saving-a-model-01-soldering/13510>\
**Category:** Hardware hacking\
**Created:** [April 9, 2025, 11:34pm UTC](https://community.keyboard.io/t/need-help-for-saving-a-model-01-soldering/13510 "2025-04-09T23:34:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![crazyrems](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.keyboard.io/crazyrems/32/5359_2.png) [@crazyrems](https://community.keyboard.io/u/crazyrems)\
**Post date:** [April 9, 2025, 11:34pm UTC](https://community.keyboard.io/t/need-help-for-saving-a-model-01-soldering/13510/1 "2025-04-09T23:34:32Z")

</div>

Hi everyone,

I have experienced keystroke issues with my Model01: duplicates when pressed or released. I have bought Mathias replacement keys switches and have replaced a couple with success so far.

But today I have changed another one and my key doesn’t register at all (the S key). I tested the switch and it looks functional. I tried connecting with a metal rod to register a key and it’s the only one that doesn’t register: I may have done a microcut or burned the PCB? What and how should I check its state/identify the flaw?

 ![PXL_20250409_231815130.MP](https://canada1.discourse-cdn.com/flex031/uploads/keyboard/original/2X/f/f9a62626dc5fced09184bada5d66d727b0cac15b.jpeg)  
 ![PXL_20250409_231826605.MP](https://canada1.discourse-cdn.com/flex031/uploads/keyboard/original/2X/6/6143e6a297ee5a8928058e0cd8b15fafe27cd070.jpeg)