Casio CT-S400 Casiotone Portable Electronic Keyboard with USB
Amazon.com: DC Jack Power Plug in Charging Port Connector Socket with Wire Cable Harness Replacement for Lenovo IDEAPAD S400 S400-5934 59340453 59342932 S400-59RF 59RF0397 : Electronics
Just saved these 3 babies from the trash, the Phat ps2's are even on of the earlier models with the s400 port : r/ps2
Getac S400 Rugged Laptop - Nex-Tech Classifieds
IEEE 1394 - Wikipedia
Casio WU-BT10 USB Wireless Bluetooth Adapter for CT-S1, CT-S400, CT-410, LK-S450
Lenovo Ideapad S400 Bottom Case Cover | Keyboard Bezel Bottom Cover Case - New Lenovo - Aliexpress
Rugged PC Review.com - Rugged Notebooks: GETAC S400