Recently I soldered together an Atreus62 inside a FalbaTech High Profile bamboo case which required the pro micro to be installed upside down and flush against the pcb. After initial assembly, everything worked great! (Here’s the first layer for reference)
After a little while (no more than a week), I started to receive multiple key presses from anything in column 4 and ONLY column 4 (per the PCB files provided by profet23 on github https://github.com/profet23/atreus62/tree/master/pcb).
If I press 4, instead I get 12345
If I press r, instead I get (tab)qwert
If I press the f key, instead I get kl;’
If I press the v key, instead I get ZXCVB
If I press the left alt key, the QMK Keyboard Test page says I press Left Control, Left OS, Left Alt, Space, Backspace, Delete, Home, End, Left, and Right Control
My main question is… is this more likely a short between pins on the Pro Micro (my current guess)? Could it be a bad diode somewhere? What baffles me is that it worked well for a couple days before rearing its ugly head. Is it possible the pro micro went bad?