Laptop keyboard keys not working — liquid, crumbs or failed ribbon?

Dead or stuck keys on a laptop keyboard rarely mean the whole keyboard is dead. The pattern of which keys are affected tells you exactly what's wrong, and some of these are quick fixes you can try in minutes.

1. One or two individual keys sticky or dead

If a couple of keys (say the spacebar and A) are sticky or dead but everything else works, it's usually debris under the keycap.

Try this:

• Power off the laptop.
• Turn it upside down and tap the bottom gently — dislodges loose crumbs.
• Use a can of compressed air: short bursts around and under the affected keys.
• Using a plastic spudger (or the tip of a butter knife wrapped in thin tape) lift a corner of the keycap — it should pop off with a light pull. Don't do this to the spacebar, Enter, or Shift — they have metal stabilisers that break easily.
• Clean underneath with a cotton bud dampened (not soaked) in isopropyl alcohol. Let dry.
• Click the keycap back on.

If it's still dead after cleaning, the membrane under that specific key has failed — you need a keyboard replacement (section 4).

2. A whole row or block of keys dead

When a row or column of keys stops working together, it's a ribbon cable issue. The keyboard matrix is scanned row-by-row and column-by-column; when the ribbon loses connection on a single trace, all the keys sharing that trace die at once.

Common patterns:

• All keys in the top row (1234567890) dead: one ribbon pin failed.
• All Q-row keys dead: another ribbon pin.
• The right half of the keyboard dead: half the ribbon has disconnected.

Fix:

• Open the laptop (bottom case off).
• Locate the keyboard ribbon where it plugs into the motherboard. Usually a ZIF (zero insertion force) connector with a small flip-up latch.
• Unlatch, pull ribbon out, inspect for tears or corrosion.
• Clean the contacts with isopropyl on a cotton bud.
• Reseat firmly, latch, reassemble.

Reseating alone often fixes it. If the ribbon is torn, a replacement keyboard is needed.

3. Random keys typing wrong characters, or sticking intermittently

Classic liquid damage pattern. Coffee, tea, juice or water has spilled at some point (even a small amount) and corrosion is creeping across the keyboard membrane.

• One key types several letters when pressed once.
• Specific keys type the wrong letter (A gives S, etc.).
• Keys register as pressed when you're not touching them (unintended activation during boot, causing weird startup behaviours).

Liquid damage under a keyboard is rarely something you can clean from outside. You'd need to remove the keyboard, clean the plastic membrane underneath ultrasonically, and even then old spills have usually corroded through traces. Usually keyboard replacement.

If the spill was recent (today, yesterday), shut the laptop down and see our laptop liquid spill guide. Quick action might save it.

4. Keyboard replacement — what to expect

On most Windows laptops the keyboard is a replaceable part:

• Business laptops (ThinkPad, Latitude, EliteBook): keyboard is often user-swappable with two screws. £30-60 part, 20 min job.
• Consumer laptops (most): keyboard is attached to the topcase with 40-80 tiny rivets melted through the topcase. Replacement requires a full strip-down, drilling out the rivets, fitting the new keyboard, securing with screws.
• Ultrabooks and ultra-thin gaming laptops: keyboard is part of the topcase. Requires a full topcase replacement.
• MacBooks (2016-2019 butterfly): see our butterfly keyboard guide. Topcase-only replacement.

Costs vary wildly: £30-120 part cost, £40-150 labour depending on the difficulty.

5. Keyboard works in BIOS but not Windows

Boot into BIOS / UEFI (usually F2 or Delete at startup). Try the keys there.

• Works in BIOS, fails in Windows: software problem, not hardware. Keyboard driver, sticky keys accessibility setting, or a stuck key on another attached keyboard. Uninstall the keyboard driver in Device Manager and reboot — Windows will reinstall it.
• Fails in BIOS too: hardware problem. Continue with sections 1-4.

6. Short-term workaround

An external USB or Bluetooth keyboard is £15-50 and will let you use the laptop until you repair it. Many people keep a laptop this way for years — especially if it's otherwise working well.

When to send it in

Keyboard replacement is one of the most common jobs we do. Post the laptop in, we'll identify whether it's a cleanable issue, a ribbon reseat, or a full keyboard swap, and quote appropriately. Free diagnosis, no-fix-no-fee, 90-day warranty. Typical turnaround 3-5 working days.