This image shows the main logic boardKey Identification DetailsPrimary Part Numbers: Often identified by part numbers JC92-02434B, JC92-02433A, or JC41-00719A.Compatible Models: Beyond the SCX-3405FW, this board is typically compatible with the SCX-3400, SCX-3405, SCX-3401, and SCX-3401FW series.Design: A green PCB featuring a Hi-Speed USB 2.0 port, various internal connectors for hardware functions, and a barcode sticker for serial/part number identification.