I/O Board HP OEM OEM documented
M21399-001

HP I/O board M21399-001

HP spare part description: "SPS-IO BOARD 14/15".

Compatible Business Laptop Models (4)

Devices documented to accept this OEM component. Compatibility from OEM documentation, not bench-tested.

Installation: Not verified

Fits these models

ModelBrandLast checked
HP ProBook 650 G8HP2026-10-29
HP ProBook 450 G8HP2026-10-29
HP ProBook 640 G8HP2026-10-29
HP EliteBook 650 G9HP2026-10-29

HP ProBook 650 G8

Business Laptop Display: 15.6"
View Model →
Fitment Details:

configuration-specific: 2 of 8 checked SKUs. Only the listed SKUs/configurations are evidenced; not a universal model fit. Saved PartSurfer BOM; no HP fetch. OEM documentation only; not bench-tested. Config limit: in the cached HP PartSurfer BOMs this part is listed on 2 of 8 checked product numbers (2X8Y9US, 3C9T5US); confirm your product number on HP PartSurfer before ordering.

Source:HP PartSurfer
Source notes

PartSurfer BOM (saved cache) 2X8Y9US / Unknown Keyword; HP description: "SPS-IO BOARD 14/15"; US product numbers: 2X8Y9US, 3C9T5US. Saved PartSurfer BOM checked offline 2026-10-29, no HP fetch (via FOB-CX-001).

HP ProBook 450 G8

Business Laptop Display: 15.6"
View Model →
Fitment Details:

configuration-specific: 1 of 8 checked SKUs. Only the listed SKUs/configurations are evidenced; not a universal model fit. Saved PartSurfer BOM; no HP fetch. OEM documentation only; not bench-tested.

Source:HP PartSurfer
Source notes

PartSurfer BOM (saved cache) 64Y01US / Unknown Keyword; HP description: "SPS-IO BOARD 14/15"; US product numbers: 64Y01US. Saved PartSurfer BOM checked offline 2026-10-29, no HP fetch (via FOB-CX-001).

HP ProBook 640 G8

Business Laptop Display: 14"
View Model →
Fitment Details:

configuration-specific: 2 of 8 checked SKUs. Only the listed SKUs/configurations are evidenced; not a universal model fit. Saved PartSurfer BOM; no HP fetch. OEM documentation only; not bench-tested. Config limit: in the cached HP PartSurfer BOMs this part is listed on 2 of 8 checked product numbers (2Y9W5US, 2Z0E6US); confirm your product number on HP PartSurfer before ordering.

Source:HP PartSurfer
Source notes

PartSurfer BOM (saved cache) 2Y9W5US / Unknown Keyword; HP description: "SPS-IO BOARD 14/15"; US product numbers: 2Y9W5US, 2Z0E6US. Saved PartSurfer BOM checked offline 2026-10-29, no HP fetch (via FOB-CX-001).

HP EliteBook 650 G9

Business Laptop Display: 15.6"
View Model →
Fitment Details:

configuration-specific: 1 of 5 checked SKUs. Only the listed SKUs/configurations are evidenced; not a universal model fit. Saved PartSurfer BOM; no HP fetch. OEM documentation only; not bench-tested. Config limit: in the cached HP PartSurfer BOMs this part is listed on only 1 of 5 checked product numbers (6G6M3US); confirm your product number on HP PartSurfer before ordering.

Source:HP PartSurfer
Source notes

PartSurfer BOM (saved cache) 6G6M3US / Unknown Keyword; HP description: "SPS-IO BOARD 14/15"; US product numbers: 6G6M3US. Saved PartSurfer BOM checked offline 2026-10-29, no HP fetch (via FOB-CX-001).

Fits these models

Summary of the documented fits above (sources on each model card); not bench-tested.

ModelBrandType
HP ProBook 650 G8HPBusiness laptop
HP ProBook 450 G8HPBusiness laptop
HP ProBook 640 G8HPBusiness laptop
HP EliteBook 650 G9HPBusiness laptop

Fit check: Always confirm the OEM part/FRU number on your machine's label or in the service manual before buying. HP PartSurfer

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