Teensy 4 and the Gameduino 3X what pinouts? 5v? Jun 7, 2020 14:08:33 GMT -8 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by jamesbowman on Jun 7, 2020 14:08:33 GMT -8 Right, I'd do an exchange with Cool Components.Might be worth checking with another jumper set first though - it's quite possible for a bad SPI connection to cause these symptoms.