You sit down to work, press a key — nothing. Or you type one letter and three of them land on screen. A laptop keyboard can fail in a dozen different ways, and it is not always the same fault. Laptops like this come through the shop almost every day, so let us help you tell apart the small thing you sort out in five minutes from a real fault that needs a technician.
What the fault looks like — find your symptom
Not every laptop behaves the same way, and the symptom says a lot about the cause:
- The whole keyboard is dead — not a single key responds. Most often a loose keyboard ribbon cable, or a software/driver problem.
- Only some keys do not work — say one row, or a couple of letters. Usually mechanical wear or dirt under the keys.
- Letters double up or repeat — you press once, it types several times. A sign of a worn contact or leftover moisture or dirt.
- “Sticky” keys — a key catches and stays pressed down. Almost always dirt or something sticky under the keycap.
- It all started after a spill — this is a separate case, and the most serious one; more on it below.
What you can check yourself before you bring the laptop in
These few steps sort out a good share of cases, or at least show exactly where the problem sits:
- Plug in an external USB keyboard. This is the most important test. If the external keyboard works normally and the built-in one does not — the fault is in the internal keyboard itself, not in the laptop or in Windows. If the external one does not work either, the problem is deeper (software or the motherboard).
- Restart the laptop. Sounds trivial, but Windows can leave the keyboard stuck after an update or after sleep. A proper restart (not just closing the lid) often clears it.
- Check Fn / NumLock. If you are getting numbers instead of letters, or it behaves oddly, NumLock or some Fn combination is probably on. Look for the key marked NumLk and try Fn + NumLock.
- Turn off Filter Keys. Windows has a setting that deliberately ignores quick or repeated key presses. If it got switched on by accident, the keyboard feels “slow” or skips letters. Find Filter Keys in the accessibility settings and switch it off.
- Check the driver. In Device Manager, under Keyboards, if there is an exclamation mark — right click, uninstall the device, then restart. Windows puts the driver back by itself.
- On-screen keyboard as a stopgap. Until the fault is sorted, the on-screen keyboard lets you get the urgent typing done. It is not a repair, but it gets you out of a tight spot.
Spilled liquid — do not put this off
Coffee, water, juice — if something has been spilled over the keyboard, the keyboard is the smallest of your problems. Underneath it are the cables and, depending on the model, a direct path to the motherboard. The danger is not the moment of the spill, it is corrosion that slowly eats into the contacts and the motherboard over the following days. A laptop can run normally for 2-3 days, then start shutting itself down or stop powering on at all.
If this has happened to you: shut the laptop down straight away (hold the power button until it goes off), unplug the charger, take the battery out if it is removable, and do not switch it on to “check whether it still works”. Bring it in or send it to us for cleaning and treatment as soon as you can. With a spill, speed is the only thing that decides whether the motherboard is saved or not — that is where motherboard repair comes in if the corrosion has already taken hold.
When it is time for a repair
If the external USB keyboard showed that the internal one is at fault, and it is not Fn/NumLock or Filter Keys — the keyboard gets replaced. On laptops it is usually the whole keyboard module that is swapped, because it is built into the chassis; picking at individual keys is rarely worth it. The replacement is a routine and quick job for a technician, and which models we do and at what price you can see in our price list.
Bring the laptop to one of our three shops in Belgrade or send it by courier — we repair it and send it back by courier, you do not have to go anywhere. We handle the whole process — diagnostics and keyboard replacement as part of our laptop repair service — quickly, and if liquid was involved, the priority is to treat it before the corrosion spreads further. If you have any questions, call 069 1303 111.
Frequently asked questions
Can I replace the keyboard on a laptop myself?
On some models the keyboard is easy to reach, but on most it is built into the upper chassis and connected to the motherboard by a ribbon cable — one wrong move and the connector is damaged. If you are not sure, better to let a technician do it.
How do I know whether the keyboard or the laptop is at fault?
Plug in an external USB keyboard. If it works normally, the fault is in the internal keyboard. If the external one does not work either, the problem is in the software or on the motherboard.
What do I do if I have spilled liquid on the keyboard?
Shut the laptop down immediately, unplug the charger and do not switch it back on. Bring it in for cleaning as soon as you can, because corrosion attacks the motherboard over the following days and then the damage goes far beyond the keyboard itself.
How long does a keyboard replacement take?
The replacement itself is quick when the module is available. The time mostly depends on sourcing the right keyboard for your particular model — we tell you that right after the diagnostics.