OEM USB sub board / I/O board assembly for NP750XBE. Third-party retailer listing only (samsungparts.com, not Samsung documentation); not bench-tested.
Source: third-party retailer listing (samsungparts.com), not Samsung
Source notes
samsungparts.com third-party retailer listing (not Samsung) "Supported Models" lists: NP750XBE. Samsung description: "Assembly Board-Usb_Sub". Read 2026-10-30 (via R3B-AG-001).