Test every key on a 17.3-inch laptop — 100 keys including a full-width number pad, the closest a laptop gets to a desktop board.
QWERTY on the US ANSI shape: a wide flat Enter and a full-length left Shift. Standard key positions, with no vendor-specific extras.
Ctrl+W, Ctrl+T, Ctrl+N, Alt+Tab and the Windows or Command key are reserved by the browser and the operating system. No web page receives them, so they cannot be tested here or anywhere else in a browser.
Keys shown greyed out with a dashed outline cannot be tested: your keyboard handles them internally and the browser never receives a key event for them. They are excluded from the totals, so 100% stays reachable.
| Detail | Value |
|---|---|
| Common name | 17.3 inch, desktop replacement |
| Testable key count | 100 keys |
| Physical keys | 101 including Fn |
| Number pad | Yes — full width |
| Function row | Yes — Esc and F1 to F12 |
| Arrow keys | Integrated, often full height |
| Navigation keys | Folded into a right-hand column |
| Key pitch | Close to a desktop keyboard |
Every figure describes the full-size laptop board this page opens on.
The largest laptop layout, and the one closest to a desktop board.
Esc through F12, then the number row and three letter rows. On a 17-inch chassis these keys sit at full desktop pitch, so mis-hits are rare.
Home, Page Up, Page Down and End fold into a column beside the letters rather than sitting in a separate island. Press each deliberately.
Unlike a 15.6-inch board, the pad here is full width. Press Num Lock itself, then work the digits, operators and the pad's own Enter, which sends a different code from the main Enter.
Five checks for the largest laptop layout.
Excluded from the total, so a working board still reaches 100% on 100 keys.
NumpadEnter sends a different code from the main Enter. Applications that bind one and not the other are common.
A 17-inch board has a large membrane. Liquid damage shows as a straight line of neighbouring keys rather than scattered singles.
Large laptop chassis flex. A pad key that needs a firm press at one corner often means the chassis is flexing rather than the switch failing.
The pad reports its codes whether Num Lock is on or off. If digits are not typing, Num Lock is off — the keys are fine.
The shape, the trade-offs and what to watch for when testing it.
A 17.3-inch chassis is roughly 400 mm wide. The alphanumeric block claims about 290 mm of that, leaving enough for a 17-key pad at close to desktop width.
A 15.6-inch chassis carries the same 100 keys but has around 60 mm less to work with, so makers narrow the pad column instead of dropping keys. This page draws that difference: the 15.6-inch layout uses a squeezed pad column, the 17.3-inch one does not.
The extra chassis width on a 17-inch laptop buys key size rather than key count. Both sizes carry 100 testable keys; the 17-inch board simply draws them larger, at a pitch close to a desktop keyboard.
For anyone moving between a desktop and a large laptop, that matching pitch is the practical benefit — typing muscle memory transfers without adjustment.
Most 17.3-inch laptops sold today are gaming or workstation machines, which means the keyboard sees heavy use on a small number of keys. Test WASD, both Shift keys, Space and Ctrl individually, then hold them together to check rollover.
Laptop keyboards rarely offer N-key rollover. A board that drops the fourth simultaneous key is normal for the class, and worth knowing before blaming a game.
A 17-inch laptop keyboard is part of the top case on most designs, so a replacement means a chassis-open repair rather than swapping a part.
Individual keycaps and scissor mechanisms are sold for most models and cost very little. Try replacing the single cap before accepting a full top-case quote, particularly when only one key is affected.
Chassis width decides which keys fit and how wide the pad is.
| Layout | Testable keys | Function row | Arrow keys | Number pad |
|---|---|---|---|---|
| 13 inch / 14 inch | 83 | Yes | Integrated | No |
| 15.6 inch | 100 | Yes | Integrated | Squeezed column |
| 17.3 inch | 100 | Yes | Integrated | Full width |
A 15.6-inch and a 17.3-inch board carry the same 100 keys. The difference is pad column width and overall key pitch, not key count.
Three faults that show up on large laptop boards.
On the test:Pad keys light on the board, but no digits appear.
On the test:The cap registers at its centre but not at an edge.
On the test:Neighbouring keys fail in a line.
The board above is already set to a 17.3-inch laptop layout, with the full-width number pad drawn.
