Which laptops does M21742-xx1 fit? M21742-xx1 (HP keyboard) is documented to fit 2 laptop models: HP ProBook 450 G8 and HP ProBook 455 G8. Fits come from OEM documentation (HP service guide), last checked 2026-11-12; not bench-tested. Full compatibility list.
HP spare part: Top cover with keyboard, backlit. Documented OEM replacement; see each fit for configuration limits.
Devices documented to accept this OEM component. Compatibility from OEM documentation or a labelled source, with a confidence level on each fit; not bench-tested.
| Model | Brand | Last checked | Confidence |
|---|---|---|---|
| HP ProBook 450 G8 All keyboard for this model | HP | 2026-11-12 | OEM documented |
| HP ProBook 455 G8 All keyboard for this model | HP | 2026-11-12 | OEM documented |
HP spare part: Top cover with keyboard, backlit. OEM documentation only; not bench-tested.
HP Maintenance and Service Guide pdf_12632943, PDF page 27: "M21742-xx1". The fetched guide names this part for this model. (via v10 fold 2026-11-12)
HP spare part: Top cover/keyboard, Backlit. OEM documentation only; not bench-tested.
HP Maintenance and Service Guide pdf_12607734, PDF page 27: "Backlit M21742-xx1". The fetched guide names this part for this model. (via v10 fold 2026-11-12)
Summary of the documented fits above (sources on each model card); not bench-tested.
| Model | Brand | Type |
|---|---|---|
| HP ProBook 450 G8 | HP | Business laptop |
| HP ProBook 455 G8 | HP | Business laptop |
Repair guides for the HP ProBook 455 G8: 17 guides
Fit check: Always confirm the OEM part/FRU number on your machine's label or in the service manual before buying. HP service guide
M21742-xx1