How to use this keyboard tester
- Click inside the box at the top (this stops shortcuts like F5 from refreshing the page).
- Press every key one by one, including function keys, arrows, Shift, Ctrl and Alt on both sides.
- Every key that registers turns green. Keys that stay grey didn’t send a signal.
- Check the “Last key” panel – it shows the exact key code your laptop sent.
What the results mean
- Key doesn’t light up: the key or its keyboard ribbon may be faulty, or the key is remapped by software.
- Wrong key lights up: usually a keyboard layout issue (check Windows language settings) or liquid damage.
- Key repeats or stays blue: a sticky or shorted key – often caused by dust or spills.
- Fn keys don’t register: many laptops handle brightness/volume keys in firmware, so the browser may not see them. That’s normal.
Why we test keyboards on every laptop
At BudgetLappy, the keyboard is one of the first things our technicians check on every refurbished laptop, because a single dead key can make a laptop frustrating to use. If you’re buying a used laptop, run this test before paying – it takes less than a minute. Our 15-point laptop checklist covers the rest.
Fixing common keyboard problems
- Restart the laptop and test again – a stuck driver is surprisingly common.
- Blow compressed air under sticky keys at an angle.
- Check Windows Settings → Accessibility → Keyboard and turn off Filter Keys / Sticky Keys.
- Update or reinstall the keyboard driver in Device Manager.
- If many keys in one row fail, the keyboard ribbon or the keyboard itself usually needs replacing.
Checking a keyboard before buying a used laptop
Keyboards take the most wear on any laptop. Before paying for a second hand laptop, run this test and also look for:
- Shiny or worn keys – signs of heavy use.
- Uneven key feel – a key that feels mushy may have a broken scissor clip.
- Backlight – toggle it with the Fn key and check every key lights evenly.
- Liquid marks – sticky residue or rust-coloured stains around keys.
Keyboard layouts: why some keys look different
Laptops sold in India mostly use the US/International layout. Some imported business laptops have UK layouts – the Enter key is taller and “@” and “”” swap places. If the wrong character appears, check Settings → Time & language → Language → Keyboard layout before assuming the key is faulty.
External keyboard as a quick fix
If a single key fails and you need the laptop right away, a USB or wireless keyboard works instantly while you arrange a repair. See keyboards on Amazon
Frequently asked questions
Is this keyboard test safe?
Yes. It runs only in your browser; nothing you type is stored or sent anywhere.
Can I test a laptop keyboard and an external keyboard?
Yes, both work. Connect the external keyboard and press its keys the same way.
Why is the Fn key not detected?
On most laptops the Fn key is handled by the keyboard controller itself and never reaches the browser, so it cannot be tested here.
How much does a laptop keyboard replacement cost?
For common business laptops it is usually affordable; prices depend on the model and whether the keyboard is separate or part of the top case.