One Row/Column of LEDs isn't lighting up, everything else working fine

  • So after fixing my LED max 7221 driver I have working LED response. I only have one row out. Anyone suspect a culprit? Soldering thanks


  • check your solders, probably on the headers.

  • Yeah, I got them all up, and they all respond tactically in monomeserial. However the adc meter isn't registering, and none of the apps are responding.