MSG copy item (9) "I/O board (includes cable) M21712-001" (cables in Cable Kit M23765-001; RJ-45 door in Plastics Kit M23767-001). Typed I/O Board (precedent). Listed for all 8 checked SKUs. OEM parts list only; not bench-tested.
Source notes
Saved HP PartSurfer product BOM(s) on box (partsurfer/cache_<SKU>.json, captured before this loop; no new HP fetch, HP OEM cool-down ON). Listed for 8 of 8 checked US product numbers (3V0K0US, 389J7US, 3A3G4US, 3V199US, 5B0T2US, 5C4Y7US, 437G6US, 3K0M9US; product name "HP ProBook 440 G8 Notebook PC (2Q524AV)"). HP description: "SPS-IO BOARD". Keyword: Unknown Keyword. OrderFlag: 1. (via MM-LOOP-052).