HP spare part: Fingerprint reader board (includes bracket). Unverified source; not bench-tested.
Source notes
Manual on file for HP ZBook Studio G4 Maintenance and Service Guide, PDF page 30: "(7) Fingerprint reader board (includes bracket) 840952-001". Source link not recorded and not verified as an HP document (red, not sure). (via v10 fold 2026-11-12)