Before starting I tested the PCB and it seemed to be working (basic keys, some modifiers, etc). When I finished the soldering process, I see the R_SHIFT key is not working, so I started to troubleshot it with my multimeter.
After texting several things, I see the following:
- the R_SHIFT switch is physically fine, closing the circuit when pressed
- the key diode seems to be also ok
- there is continuity between the key and the microcontroller pads
- when connecting the keyboard to Linux, I cannot detect any keystroke using commands such as xev
Do I have a faulty microcontroller? (it will be the second one this year :-/ )