Causing of a Broken Column on Corne
My third column (P1.15) on a corne keyboard suddenly stopped working. I tear down the Nice!Nano!, and measured the resistance between P1.15 and GND is around 160 Ohm. While the P1.13 and P1.11 both have more than 2k resistance to GND. Notes that the resistence is measured on the chip separtely, without any wiring.
Does it mean the chip is broken and I need to replace it?
9 Replies
It's possible the nice!nano is damaged, but let's try some troubleshooting first.
A resistance of 160 ohms between P1.15 and GND is unusual. It could indicate a short.
First, check the solder joints on the PCB for that column. Make sure there are no solder bridges or shorts. Also, check the hotswap socket if you're using one.
If the solder joints look good, try reflowing the solder on the nice!nano pin. Sometimes a bad joint can cause this.
If that doesn't work, it's possible the nice!nano is damaged. You can try replacing it, but it's not guaranteed to fix the issue.
You can find more info on our troubleshooting page.
Let me know if you have any other questions!
can you share a little more about your set up, maybe an image?
https://discord.com/channels/924164891990978570/1308172376017473556/1326973650200432823I noticed this theory that it could be caused by USB-C charging. It resonates with my experience. My column stopped working just when I was charging the right side keyboard, and I use the aluminum case. I tried re-soldering, it didn't help
Your problem reminds me of an issue I'm experiencing right now. But I have a broken middle row.
Is resistance ok when you measure sockets without a controller installed?
I did measure some connections on the board and there were no weird measurements. I think my board should be good.
Yes this is likely the issue :/
we can send you a replacement
please send me a DM with your order number
unfortunately the nano does not handle ESD shocks well, and the metal case + winter dry creates a bad time
Updates:
I replaced the nice nano chip on the right side, then it was not able to connect to the left side.
I ultimately re-flashed the bootloader of the left side using adafruit-nrfutil after bricking it following ZMK's troubleshoot to flash nvsclear.uf2.
Now everything is working.
Really appreciate the help from you and @Micky.