# Suggestions for fixing a blown diode connection **URL:** \ **Category:** Hardware hacking\ **Created:** [July 7, 2021, 12:42am UTC](https://community.keyboard.io/t/suggestions-for-fixing-a-blown-diode-connection/4885 "2021-07-07T00:42:37Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dsummersl](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.keyboard.io/dsummersl/32/918_2.png) [@dsummersl](https://community.keyboard.io/u/dsummersl)\ **Post date:** [July 7, 2021, 12:42am UTC](https://community.keyboard.io/t/suggestions-for-fixing-a-blown-diode-connection/4885/1 "2021-07-07T00:42:37Z")
Hi there, Several months back the ‘M’ key stopped working on my Model 01. I tried cleaning the switch, then tried a new switch, still didn’t work. Then I noticed that there was a little scorch mark on the left side of a little diode above the key, and I realized that the connection was not completing there (see attached keypress), tried in vain to re-solder the attachment. I gave up, and cried uncle! At any rate, I miss my keyboard, and figure…there has to be a way to reattach this diode… Using a couple wires to bridge the gap on the diode and simulating a keypress I can recreate keypresses - I’m thinking I just need to find a way to re-solder it…but…I’m finding it extremely difficult to get my fat fingers in there and reconnect the diode. Are there more accessible places where I could resolder another zener diode maybe? Any suggestions appreciated! [![Google Photos](https://lh3.googleusercontent.com/28kv8X80t1g8Bpg1CJQNpvWtwWeaoB1MKjUBSlBXO8jwLw8Dz2jwgTOSXsW97nNvsQfbOoDb8gAYMHI1zvL3AgHp7-Ucu7mTUUdRWao2wz_LKXtq4kNf9JWZSyDaCMQMKGGZbzxSNDI=w600-h315-p-k "New photo by Dane Summers") ](https://photos.app.goo.gl/7FHcofLguvQws2dt6) PS - key position is ‘SW-R-R3C11’. ---
**Author:** ![jesse](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.keyboard.io/jesse/32/361_2.png) [@jesse](https://community.keyboard.io/u/jesse)\ **Post date:** [July 7, 2021, 7:16pm UTC](https://community.keyboard.io/t/suggestions-for-fixing-a-blown-diode-connection/4885/2 "2021-07-07T19:16:07Z")
Yup. You’ll wanna run a through-hole 1N4148 diode between the right-hand (when viewed from the back) pin of that switch to the test point for Col 11: ![image](https://canada1.discourse-cdn.com/flex031/uploads/keyboard/original/2X/5/556d01fef0c61fe5a0eac2418c4f228f7998602c.jpeg) ---
**Author:** ![dsummersl](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.keyboard.io/dsummersl/32/918_2.png) [@dsummersl](https://community.keyboard.io/u/dsummersl)\ **Post date:** [July 8, 2021, 1:03am UTC](https://community.keyboard.io/t/suggestions-for-fixing-a-blown-diode-connection/4885/3 "2021-07-08T01:03:56Z")
Thanks so so much, that worked! Reassembled and ready for work tomorrow 🌈