HP ProBook Key Replacement: Match Your 440, 445, 450, or 455 G8–G10
Need an HP ProBook replacement key? Match the full model and generation, then compare the key and retainer options before choosing a repair kit.
“ProBook 450” is only part of the model name. A search for a 450 G10 keyboard replacement or a 455 G9 replacement key should lead you to that exact model, even when another ProBook's keyboard looks familiar. The guide below gives you a direct route to the 440, 445, 450, and 455 models across G8, G9, and G10.
First decide whether a single key is the right repair
An individual key repair makes sense when the damage is confined to the cap, its retainer clip, or the rubber cup, and the mounting points on the keyboard are intact. Common examples include a missing letter cap or a broken hinge that lets one key rock from side to side.
If the key travels normally but does not register, or several keys stopped working together, investigate that fault before buying a kit. Mechanical replacement parts do not fix the keyboard's electrical circuitry. A damaged keyboard base or liquid damage may require a broader repair.
Find the complete ProBook model and generation
Check the model information on the laptop or follow our laptop identification guide. Write down both the number and the generation: for example, HP ProBook 450 G10. Do not infer G10 from the year you bought the machine, and do not treat 450 and 455 as the same model.
Then compare your keyboard with the layout and options on the product page. Keep track of backlighting, regional layout, and the actual key you need. If a keyboard was replaced previously, photos of its current parts are especially helpful.
Choose your ProBook replacement key page
| Model family | G8 | G9 | G10 |
|---|---|---|---|
| ProBook 440 | 440 G8 keys | 440 G9 keys | 440 G10 keys |
| ProBook 445 | 445 G8 keys | 445 G9 keys | 445 G10 keys |
| ProBook 450 | 450 G8 keys | 450 G9 keys | 450 G10 keys |
| ProBook 455 | 455 G8 keys | 455 G9 keys | 455 G10 keys |
This table is a model selector, not an interchangeability chart. A listed model still requires you to select the key and check its available options. For other generations or older ProBooks, use the complete HP ProBook catalog.
450 G10 or 455 G9: check the retainer option too
The model page is the starting point. A keycap can have the correct printed symbol and still fail to attach if the underside does not match the retainer. Compare the hinge pictures and options shown for your selected model before adding the key to your cart.
If your original cap has come off, keep it with any loose clip pieces. A clear photo of the underside and the exposed key location can help resolve a match. You do not need to remove an intact neighboring key just to collect a photo. Use our contact form if the relevant parts are not visible or you cannot distinguish the options.
For a lit keyboard, also read the backlit key replacement guide. The fact that two caps fit a similar-looking space does not establish that their appearance and mechanism are correct for your keyboard.
Choose the parts for the damage you have
- Missing or cracked cap: inspect the existing hinge before deciding that the cap is the only damaged piece.
- Loose key or broken hinge: compare the retainer clip as well as the cap's attachment points.
- Key does not return after a press: inspect the mechanism and rubber cup; do not assume a new cap will restore the movement.
- Large key lifts on one side: check the stabilizing hardware and use instructions appropriate to that key. Avoid forcing it flat.
Review the repair-kit selection on the product page to confirm what is included. Check the price for your actual key and selected options instead of assuming all keys cost the same.
Before installing your new ProBook key
Shut down the laptop and disconnect the charger. Follow the installation guide for the matching clip style, keeping the old pieces until the repair is complete. If the replacement does not align naturally, stop and recheck the model, key, and retainer selection.
Once installed, check that the key sits evenly, moves freely, returns after a press, and types normally. If the physical repair is sound but input still fails, the remaining problem needs diagnosis beyond the cap and hinge.
Find your HP ProBook replacement key, or send your model number and photos for help choosing. Taking a moment to confirm the generation and mechanism is easier than ordering a visually similar part that will not attach.
ProBook 450 G8: missing key or keyboard fault?
If one cap or clip is visibly broken, start with the model-matched ProBook 450 G8 replacement-key page and compare the retainer choices. A single-key kit may be suitable when the mounting points remain intact. If the keys move normally but several do not type, investigate the keyboard or software before buying caps. Do not choose the 450 G9 or G10 listing as a substitute for the G8.
Frequently asked ProBook replacement questions
Will a ProBook G8 key fit a G9 or G10?
Do not assume it will. Match the full model, generation, layout, key position, and retainer. A similar cap shape is not enough to establish compatibility.
How do I choose a backlit replacement key?
Confirm the keyboard's configuration and compare the offered options. A backlight that is off or faulty does not prove the keyboard is non-backlit. Use the backlit key matching guide or ask us to check photos before ordering.
Why are several clip choices offered for my ProBook?
The model listing can cover more than one retainer style. Compare the exposed mechanism and underside of the loose cap with the selector photos, and choose the option that matches your keyboard.
Can a key kit fix a ProBook that does not type?
A kit repairs suitable damage to the cap, hinge, or rubber cup. It does not fix pairing, driver, or keyboard-circuit faults. If the key moves normally but fails to register, diagnose the input problem first.