Which I/O board fits the HP EliteBook 640 G9? OEM part numbers

2 I/O boards are documented for the HP EliteBook 640 G9: M21399-001, M48790-001. 2 of 2 come from OEM documentation (support.hp.com, partsurfer.hp.com); last checked 2026-11-04. Not bench-tested: match the number on your old I/O board and any constraint before ordering.

Part number	Part	Constraints	Confidence	Last checked
M21399-001	HP I/O board M21399-001	HP description: "I/O board for non-vPro models". Listed in a sibling or family document (tier B). OEM documentation only; not bench-tested.	OEM documented	2026-11-04
M48790-001	HP USB board M48790-001	Listed for all 5 checked HP EliteBook 640 G9 product numbers. HP description: "SPS-IO BD Vpro 14/15". Confirm your product number on HP PartSurfer before ordering. OEM parts list only; not bench-tested.	OEM documented	2026-10-26

Where do these HP EliteBook 640 G9 I/O board part numbers come from?

2 of 2 fits are from OEM documentation (support.hp.com, partsurfer.hp.com); each row links its source. Last checked 2026-11-04.

Are these I/O boards tested in the HP EliteBook 640 G9?

No. Fits come from manufacturer or retailer documentation and are not bench-tested. Check the part number on your old part and any listed constraint.

All documented parts for the HP EliteBook 640 G9.

Other parts for the HP EliteBook 640 G9

Power Adapter (48) · Hinge (1) · Speakers (1) · Cable (24) · RTC Battery (1) · Battery (2) · Screen (6) · Fan (3) · Display Cable (1) · Display Bezel (6) · Display Back Cover (5) · Bottom Cover (3) · Heat Sink (3) · Keyboard (4) · Touchpad (2) · Camera (2) · SSD (12) · Wireless Card (6) · Power Cord (77) · Microphone (1) · Fingerprint Reader (3) · Antenna (3) · Motherboard (21) · Service Part (19) · Memory (4) · Card Reader (1) · Screw Kit (3)

For AI agents: the same list as JSON from the free MCP server at /mcp (tool get_model_parts, model hp-elitebook-640-g9) or the keyless JSON API.