The keyboard is not responding at all

You press the keys, but nothing appears: your keyboard is no longer responding at all. Whether it’s the built-in keyboard of a laptop, a wired or wireless external keyboard, this freeze is confusing — without a keyboard, it’s hard to do anything. Yet, in most cases, the problem is simple to solve: a dead battery, a poorly connected cable, a wireless connection to re-establish, a frozen software, or a setting to adjust. Rarely, it’s a real hardware issue. The good news: by proceeding methodically, from the simplest to the most advanced, you almost always find a functional keyboard. Let’s see how to react when the keyboard no longer responds: the possible causes, the steps to follow to unlock it according to the type of keyboard, and how to avoid this happening again.

Why a keyboard stops responding

A keyboard can stop responding for various reasons, often minor; here they are. The TYPE of keyboard matters: the cause depends on the type; built-in (laptop), wired external keyboard, WIRELESS (Bluetooth or dongle); the clues differ depending on the type; first identify which keyboard it is. For a WIRELESS keyboard: the BATTERY: the most common cause of a silent wireless keyboard is a dead BATTERY or battery; without power, it no longer responds; changing or recharging the battery often solves the problem; the first reflex (we’ll come back to it). The lost WIRELESS connection: a wireless keyboard can lose its connection (Bluetooth disconnected, dongle poorly connected, interference); reconnecting restores it; the wireless can drop; check the connection. For a WIRED keyboard: the CABLE: a silent wired keyboard often has a CABLE or PORT issue; unplugged, poorly inserted, damaged, or faulty port; checking and reconnecting often solves the problem; the physical connection is at fault. A FROZEN SOFTWARE: the keyboard may seem dead while it’s the SYSTEM or an application that is frozen (not the keyboard itself); the computer no longer responds, so neither does the keyboard; unlocking the system solves the problem; it’s not always the keyboard. A PARTICULAR SETTING: some settings can interfere; « slow keys, » « bounce keys, » accessibility locks activated by mistake, wrong layout; these settings disrupt typing; checking them helps (we’ll come back to it). A TEMPORARY BUG: sometimes, a temporary bug « freezes » the keyboard; a restart unlocks it; it’s temporary and harmless; the restart solves many issues. A SPILLED LIQUID: if you spilled a liquid on the keyboard, it may block it (sticky keys, short circuit); it’s more serious; liquid is the enemy of the keyboard (we’ll come back to it). DIRT or a stuck key: dust, crumbs, dirt under the keys can block one or more keys; cleaning helps; a physically stuck key no longer responds. A real MATERIAL ISSUE: more rarely, the keyboard is actually faulty (wear, damage, failure); this is the case if nothing else explains it; the hardware can fail; it’s the last hypothesis. Distinguishing KEYBOARD or SYSTEM: is the keyboard really the issue, or is the computer frozen? Does the mouse work? Does the rest respond? These observations locate the problem; sometimes it’s not the keyboard. Why UNDERSTANDING helps: knowing that the cause depends on the type of keyboard (battery for wireless, cable for wired, frozen system, setting) helps target the right check rather than concluding too quickly to a failure. The main idea: a keyboard that no longer responds most often has a SIMPLE cause, which depends on its type. For a WIRELESS keyboard, first think of the BATTERY (dead) or the connection (lost). For a WIRED keyboard, check the CABLE and the PORT (unplugged, damaged). In all cases, the blockage can also come from the FROZEN SYSTEM (not the keyboard itself: the computer no longer responds), an ACCESSIBILITY setting activated by mistake, or a temporary bug that a restart solves. More seriously, a spilled liquid or dirt can block the keys, and rarely, the keyboard is actually broken. The right approach is to proceed from the simplest to the most advanced (battery, cable, connection, restart, settings) and to distinguish whether it’s the keyboard or the computer that is at fault. Understanding the probable cause according to the type guides the repair.

How to unlock a keyboard

Here’s the procedure, from the simplest to the most advanced, depending on the type of keyboard. CHECK if it’s the SYSTEM: first, does the computer respond otherwise (the mouse moves, the clicks work)? If everything is frozen, it’s the SYSTEM (not the keyboard); unlock the computer (patience, restart); consult our guides on the frozen computer; this test orients. For a WIRELESS keyboard — the BATTERY: change or recharge the battery; this is the #1 cause of a silent wireless keyboard; a dead battery doesn’t always warn; this simple gesture often solves the problem; start with this. For a WIRELESS keyboard — the CONNECTION: check the connection; is Bluetooth enabled and the keyboard connected? Is the dongle (small USB receiver) properly plugged in? Reconnect the keyboard (repair if needed); move it closer; the lost connection is restored. WIRELESS keyboard SWITCH: many wireless keyboards have an ON/OFF switch; check that it’s on « ON »; it may have been accidentally turned to « OFF »; a common oversight; check it. For a WIRED keyboard — the CABLE: check the cable; is it properly plugged in (on both sides)? Unplug and replug firmly; try ANOTHER USB port; check that the cable isn’t damaged; the physical connection is often the issue. TEST another PORT: plug the keyboard into another USB port; if it works, the first port was faulty; this test isolates the problem; change the port. RESTART the computer: a restart solves many temporary keyboard freezes (bug, stuck driver); if the keyboard is silent but you can restart (with the mouse), do it; the restart « resets. » TEST the keyboard elsewhere: plug the keyboard (external) into another computer; if it works, it was your computer (setting, port); if it remains silent, it’s the keyboard; this test identifies the culprit. TEST ANOTHER keyboard: plug another keyboard into your computer; if it works, your keyboard was the issue; if it remains silent too, it’s the computer (setting, system); this test completes the diagnosis. Check the ACCESSIBILITY SETTINGS: settings like « slow keys, » « bounce keys, » or a lock can block typing; deactivate them in the accessibility settings; they sometimes activate by mistake (we’ll come back to it). CLEAN if keys are stuck: if specific keys are stuck (dirt, crumbs), clean them gently (blow, flip the keyboard); a stuck key blocks; gentle cleaning helps. For a SILENT built-in keyboard: if the laptop keyboard is silent, in the meantime, plug in an external keyboard (USB) to use the computer; this is a temporary fix and confirms if it’s the built-in keyboard; a practical backup solution. In summary, to unlock a keyboard: first check if it’s the SYSTEM that is frozen (does the mouse work?); for a WIRELESS keyboard, change/recharge the BATTERY (#1 cause), check the CONNECTION and the SWITCH; for a WIRED keyboard, check the CABLE and try another PORT; RESTART the computer (solves many bugs); test the keyboard elsewhere or another keyboard to isolate the culprit; check the ACCESSIBILITY SETTINGS (slow/bounce keys) and clean the stuck keys; plug in an external keyboard to temporarily fix a laptop. This methodical approach, from the simplest to the most advanced, almost always unlocks the keyboard; the battery, the cable, the connection, and the restart are the first leads.

The first reflexes depending on the type of keyboard: battery for wireless, cable for wired, and the « other keyboard » test to diagnose everything. Faced with a silent keyboard, the key is to start with the most likely cause according to your type of keyboard, before suspecting a failure. If your keyboard is WIRELESS (Bluetooth or with a small USB receiver, the « dongle »), first and foremost think of the BATTERY. This is by far the number one cause of a wireless keyboard that suddenly stops responding: the battery or battery is simply dead, and without power, the keyboard no longer transmits anything. The trap is that a battery doesn’t always warn you: the keyboard was working an hour ago, and now it’s silent. Change the battery (or recharge the battery) before any other manipulation: in many cases, the keyboard comes back to life immediately. Check at the same time two things often forgotten: the ON/OFF switch (many wireless keyboards have one under or behind the keyboard, which may have switched to « OFF » when moving it), and the CONNECTION (is Bluetooth still active and the keyboard connected? Is the dongle properly inserted in its port?). Reconnecting or replugging the receiver often restores the lost connection. If your keyboard is WIRED, the first reflex is different: check the CABLE and the PORT. Unplug and replug the cable firmly on both sides; a slightly dislodged connector is enough to cut the communication. Above all, try ANOTHER USB port: a port may be faulty while the others work perfectly; this simple change solves many cases. Also check that the cable isn’t visibly damaged (pinched, twisted, stripped), especially near the connectors. And regardless of the type of keyboard, one gesture solves many temporary freezes: RESTART the computer. A software bug or a stuck driver can « freeze » the keyboard, and the restart resets everything. Now, if these first reflexes aren’t enough, there’s a gold test to know WHERE the problem really is: the test of the OTHER keyboard (and its inverse). Plug another keyboard into your computer: if it works, it’s indeed your original keyboard that is the issue (hardware); if it remains silent too, then it’s not the keyboard but the COMPUTER (a setting, the system, or a connection) that needs to be checked. Conversely, plug your keyboard (if it’s external) into another computer: if it works there, your keyboard is fine and the issue is with your original computer; if it remains silent everywhere, the keyboard is actually faulty. This simple isolation test saves you from looking in the wrong place and immediately tells you whether to repair the keyboard or check the computer. A last useful reflex for a LAPTOP keyboard whose keys no longer respond: plug in an external USB keyboard. Not only does this immediately help you continue using the computer, but if the external keyboard works, it confirms that the problem is indeed limited to the built-in keyboard. By combining these reflexes — the battery for wireless, the cable and port for wired, the restart for bugs, and the other keyboard test to isolate the cause — you diagnose and resolve the vast majority of silent keyboards without effort. Always start with the simplest and most likely: often, it’s just a dead battery or a cable to replug.

Avoiding keyboard freezes and special cases

Some habits prevent freezes, and certain cases deserve special attention; here’s the essential. MONITOR the battery (wireless): for a wireless keyboard, keep spare batteries or recharge before they’re empty; many indicate a low battery level; anticipating prevents sudden freezes; vigilance on the battery prevents. MAINTAIN the cable (wired): take care of the cable of a wired keyboard (don’t twist it, don’t pull on it); a well-maintained cable lasts; maintenance prevents cuts; care prolongs. CLEAN regularly: dust the keyboard from time to time (crumbs, dust under the keys); flip it, blow gently; accumulated dirt blocks the keys; maintenance keeps reactivity. KEEP liquids away: don’t drink or eat above the keyboard; a spilled liquid is the #1 enemy of the keyboard (sticky keys, short circuit, failure); keep drinks and food away; prevention avoids the worst (we’ll come back to it). ACT QUICKLY on a spill: if you spill a liquid, IMMEDIATELY turn off the computer (laptop) or unplug the keyboard, flip it to drain, dry, and let it dry for a long time before turning it back on; quick action limits damage; don’t turn it back on too soon. Case — ACCESSIBILITY SETTINGS: if keys behave strangely (slowness, non-response, repetition), check the ACCESSIBILITY settings (slow keys, bounce keys, sticky keys); they sometimes activate by an unintended shortcut; deactivating them solves the problem; unknown but frequent. Case — NUMERIC LOCK: on some keyboards, a numeric keypad or lock (Num Lock) can change the behavior of the keys; check these locks; they confuse; a simple lock can explain strange behavior. Case — WRONG LAYOUT: if the keys type the wrong characters (not « silent » but « wrong »), it’s the layout (AZERTY/QWERTY) incorrectly set; check the keyboard language/layout in the settings; a setting, not a failure. KEEP updated: keep the system up to date (keyboard drivers too); updates fix bugs; software updates stabilize; consult our guides on updates. HAVE a BACKUP keyboard: keeping a cheap external USB keyboard on hand helps in case of a freeze (especially for a laptop); a practical backup solution; anticipation reassures. WHEN to CONSULT: if the keyboard remains silent despite all checks (and another keyboard works), it’s probably faulty; for a built-in keyboard, a professional can repair/replace it; for an external one, replace it; hardware has a limit. In summary, to avoid freezes and manage special cases: monitor the BATTERY (wireless), maintain the CABLE (wired), clean regularly (crumbs, dust), keep LIQUIDS away (enemy #1: react quickly if you spill — turn off, dry, wait), and know the frequent cases (ACCESSIBILITY SETTINGS activated by mistake, LOCKS, wrong LAYOUT). Keep the system up to date, have a backup keyboard, and consult if the keyboard remains faulty despite everything. These habits prevent most freezes; vigilance on the battery/cable, cleanliness, and keeping liquids away are the keys to a reliable keyboard.

Warning: a spilled liquid is the #1 danger for the keyboard — react immediately and don’t turn it back on too soon; and check the accessibility settings before concluding a failure. Two points of vigilance are essential. The first, the most critical, concerns LIQUIDS. Spilling coffee, a glass of water, or any drink on a keyboard — especially the built-in keyboard of a laptop — is the most damaging accident: the liquid seeps under the keys, can stick the mechanisms, and especially cause a SHORT CIRCUIT that damages not only the keyboard but sometimes the computer itself. The speed of your reaction makes all the difference between a repairable incident and an expensive failure. If you spill a liquid on a laptop keyboard, every second counts: TURN OFF the computer immediately (as quickly as possible, even by forcing the shutdown by holding the button — here, cutting the power is paramount, as it’s the current combined with the liquid that causes electrical damage), unplug it from the power supply, and if you can do it safely, cut or remove the battery. Then FLIP the device (keyboard down, « tent » position) so the liquid flows out rather than penetrating deeper into the components. Gently blot the liquid on the surface with an absorbent cloth, without rubbing. Then — and this is the most important and most neglected point — LET IT DRY FOR A LONG TIME, much longer than you think: ideally several days, in a dry and ventilated place, before even considering turning it back on. The temptation to check « if it still works » after a few hours is the fatal trap: turning it back on while there’s still moisture inside causes the short circuit you’re trying to avoid, and turns an incident into a definitive failure. For a sweet or sticky liquid (soda, juice, sweet coffee), the dried residues can also permanently stick the keys: professional cleaning is then often necessary. In case of doubt, or for a significant spill, have the device examined by a professional before turning it back on: a cautious diagnosis is better than a risky restart. And of course, the best protection remains prevention: permanently keep drinks and food away from your keyboard. The second point of vigilance, at the opposite of the dramatic, avoids concluding too quickly to a failure: the ACCESSIBILITY SETTINGS. Before believing your keyboard is broken, know that accessibility functions activated by mistake can make it behave in a confusing way — keys that only respond after a long press (« slow keys »), keys that seem ignored (« bounce keys »), or modifiers that remain « stuck » (« sticky keys »). These settings, designed to help some users, sometimes activate unintentionally (often via a keyboard shortcut pressed by mistake, like a repeated press on a key), and give the impression of a faulty keyboard while it works perfectly. Before any pessimistic diagnosis, therefore check the ACCESSIBILITY SETTINGS of your system and verify that these options are deactivated; also check any LOCKS (Num Lock) and the KEYBOARD LAYOUT (if the keys type the wrong characters, it’s a language setting AZERTY/QWERTY, not a failure). Many « broken » keyboards are just settings to correct. In summary, keep these two opposite reflexes: faced with a liquid, act in EMERGENCY (turn off, flip, dry for a long time, don’t turn on too soon) because the damage is real and quick; faced with strange behavior, keep your CALM and check the accessibility settings before concluding a failure. The first can save you from losing your computer; the second, from replacing a keyboard that works very well.

Frequent questions

My laptop keyboard doesn’t work: can I still use the computer?

Yes: plug in an external USB keyboard, it will work immediately and allow you to use the computer normally while waiting to solve (or have repaired) the built-in keyboard. Here’s the essential. The BACKUP solution: plug in an EXTERNAL keyboard (USB or wireless) on your laptop; it usually works immediately, without settings; you regain full typing; it’s the simplest and most effective temporary fix. This DEPANNS immediately: with an external keyboard, you can use the computer normally (work, browse, type your passwords); the laptop remains fully usable; the silent built-in keyboard is no longer blocking. This CONFIRMS the diagnosis: if the external keyboard works perfectly, it confirms that the problem is indeed LIMITED to the built-in keyboard (not the system); the rest of the computer is fine; this test isolates the issue on the internal keyboard. Which keyboard to CHOOSE: any USB keyboard (wired, direct connection) or wireless (Bluetooth or dongle) works; a cheap model is enough to depann; keeping one on hand is wise; the depann doesn’t cost much. The ON-SCREEN keyboard too: as a temporary fix, systems offer a VIRTUAL KEYBOARD (on-screen), usable with the mouse; it’s slow but depanns to type the essential (a password); a backup option if you don’t have an external keyboard. While waiting for REPAIR: the external keyboard allows you to wait calmly to solve the problem (checks) or have the built-in keyboard repaired (by a professional); you’re not blocked in the meantime; it’s comfortable. Check the SIMPLE CAUSES first: before concluding a failure of the built-in keyboard, check the simple causes (frozen system? accessibility settings? restart?); the external keyboard helps to do these checks comfortably; sometimes the built-in keyboard comes back. The REPAIR of the built-in keyboard: if the built-in keyboard is actually faulty, its repair (by a professional) is possible but may be a bit technical (it’s built-in); in the meantime, the external keyboard is a durable and comfortable solution; weigh repair or prolonged use of an external. The ADVICE: yes, plug in an external USB keyboard to use the computer immediately; it depanns, confirms that the problem is the built-in keyboard, and gives you time to solve or have it repaired; keep an external keyboard on hand. In summary, yes, a faulty laptop keyboard doesn’t immobilize the computer: simply plug in an EXTERNAL keyboard (wired USB or wireless), it will work immediately and allow you to use the computer perfectly normally. This gesture has a double advantage: it DEPANNS you immediately (you regain full typing), and it CONFIRMS the diagnosis (if the external works, the problem is indeed limited to the built-in keyboard, not the system). As a temporary fix without a keyboard on hand, the on-screen virtual keyboard (usable with the mouse) allows you to type the essential. Take advantage of this respite to check the simple causes (frozen system, accessibility settings) — sometimes the built-in keyboard comes back. And if it’s actually faulty, the external keyboard is a durable solution while waiting for professional repair. Keeping a cheap external keyboard on hand is a wise precaution: a silent built-in keyboard then becomes a simple inconvenience, not a blockage.

How to know if it’s the keyboard or the computer that’s at fault?

Do cross-tests: your keyboard on another computer, and another keyboard on yours; if the problem follows the keyboard, it’s it; if it stays on your computer, it’s the computer. Let’s see the method. The principle of CROSS-TESTS: to know if the problem comes from the keyboard or the computer, test each one separately; you see which one « carries » the problem; these isolation tests are the most reliable method. Test 1 — your keyboard ELSEWHERE: plug your keyboard (external) into ANOTHER computer; if it works, your keyboard is fine (the problem is on your computer); if it remains silent, the keyboard is faulty; this test judges the keyboard. Test 2 — another keyboard at YOURS: plug ANOTHER keyboard into your computer; if it works, your computer is fine (the problem was your keyboard); if it remains silent too, it’s your computer (setting, system); this test judges the computer. CROSS the RESULTS: the two tests overlap; if the problem FOLLOWS your keyboard (silent everywhere) → it’s the keyboard; if the problem STAYS on your computer (all keyboards silent on it) → it’s the computer; the logic is simple. Check if the SYSTEM is frozen: another clue; does the computer respond otherwise (mouse, clicks)? If EVERYTHING is frozen, it’s not the keyboard but the SYSTEM that is blocked; unlock the computer; the keyboard is then not at fault. For a BUILT-IN keyboard: you can’t plug it elsewhere; but plugging an EXTERNAL keyboard into the laptop is like test 2; if the external works, the built-in keyboard is at fault; if it remains silent, it’s the computer; adapt the method. The SUPPLEMENTARY CLUES: did the problem appear after an event (update → computer; fall/liquid → keyboard)? one key or all? these clues also orient; observe the context. Check the SETTINGS first: before concluding « faulty computer, » check the settings (accessibility, layout); often « the computer at fault » is just a setting to correct; it’s not necessarily serious. What this ORIENTS: if it’s the keyboard → repair/replace the keyboard; if it’s the computer → check settings, ports, system; the diagnosis guides the solution; knowing where to look saves time. The ADVICE: do the two cross-tests (your keyboard elsewhere, another keyboard at yours); the problem that follows the keyboard designates the keyboard, the one that stays on the computer designates the computer; first check that the system isn’t frozen and that it’s not a setting. In summary, to know if it’s the keyboard or the computer, do CROSS-TESTS: plug your keyboard into another computer (if it remains silent, it’s the keyboard; if it works, it’s your computer), and plug another keyboard into yours (if it works, it was your keyboard; if it remains silent, it’s your computer). The problem that FOLLOWS the keyboard designates the keyboard; the one that STAYS on the computer designates the computer. Also check that the system isn’t simply frozen (does the mouse respond?), and before blaming the computer, check the settings (accessibility, layout), often at fault. For a built-in keyboard, plugging in an external keyboard plays the same role as a test. These isolation tests immediately tell you where the problem is, and therefore whether to repair the keyboard or check the computer — a clear diagnosis that saves you from looking in the wrong place.

A single key no longer responds: what to do?

Often, it’s dirt under the key or the key itself: clean it gently underneath; if it persists, an external keyboard or a repair depanns; an isolated key is rarely serious. Here are the leads. The frequent cause — DIRT: a single key that no longer responds is often blocked by DIRT, a crumb, dust stuck underneath; this prevents contact; cleaning underneath often solves the problem; the most common culprit. CLEAN under the key: blow under the key (dry air); flip the keyboard and tap gently to dislodge crumbs; on some keyboards, you can carefully remove the keycap to clean underneath (with caution); gentle cleaning frees the key. A STUCK key: is the key physically stuck (pressed, glued by dried liquid)? a sweet liquid glues the keys; gentle cleaning (dry, or for sticky, a professional) helps; the mechanism must move freely. Test a RESTART: rarely, a bug; restart to rule out a software issue; if the key comes back, it was temporary; the restart is a simple test. Check that it’s indeed the KEY: type the key in different contexts (a document, elsewhere); is it silent everywhere? this confirms that it’s the key (hardware), not a context; the test generalizes. An IMPORTANT key: if it’s an essential key (Enter, Space, a common letter), the keyboard quickly becomes annoying; an external keyboard depanns in the meantime; don’t suffer from a missing essential key. A TEMPORARY WORKAROUND: as a temporary fix, you can sometimes remap the key or use an on-screen keyboard for that character; these are temporary solutions; the external keyboard is more comfortable; depann while waiting to repair. The EXTERNAL keyboard: as for a completely silent keyboard, plugging in an external keyboard solves everything in the meantime; you regain all the keys; a simple and comfortable solution; keep one on hand. The REPAIR: if a key remains dead despite cleaning, its mechanism may be faulty; on an external keyboard, replace it (inexpensive); on a built-in keyboard, a professional can repair it; an isolated dead key is a minor issue. Don’t FORCE: don’t press violently on a stubborn key (you risk damaging it further); clean gently; delicacy preserves; force worsens. The ADVICE: for a single silent key, clean it gently underneath (blow, tap, possibly remove the cap with care); restart to rule out a bug; if it persists, depann with an external keyboard and consider a repair or replacement; don’t force. In summary, a single key that no longer responds is most often due to DIRT stuck underneath (crumb, dust) or the key itself (mechanism, sticky residue from dried liquid). Clean it gently: blow underneath, flip the keyboard and tap, or carefully remove the keycap to clean. Restart to rule out a rare software bug. If the key remains dead despite cleaning, its mechanism is probably faulty: on an external keyboard, replacement (inexpensive) solves the issue; on a built-in keyboard, a professional can repair it. In the meantime, an external keyboard gives you all your keys, especially if the faulty key is essential (Enter, Space, a common letter). Never force on a stubborn key (you’d damage it further); always clean gently. An isolated key out of service is a minor issue, usually due to dirt and easy to depann; gentle cleaning is your first move.

What to remember

A keyboard that no longer responds almost always has a SIMPLE cause, which depends on its type — and the right approach is to proceed from the most likely to the most advanced. For a WIRELESS keyboard, first think of the BATTERY (dead: it’s the #1 cause; change it or recharge), then the ON/OFF switch (did it switch?), and the CONNECTION (Bluetooth active? dongle plugged in? reconnect). For a WIRED keyboard, check the CABLE (replug firmly) and try ANOTHER USB port (a port may be faulty). In all cases, first check if it’s not the SYSTEM that is frozen rather than the keyboard (does the mouse respond?), and RESTART the computer (this solves many temporary freezes). To know where the problem really is, do the gold test: plug ANOTHER keyboard into your computer (if it works, your keyboard was the issue; otherwise, it’s the computer) and, if possible, your keyboard into another computer. This cross-test identifies the culprit and saves you from looking in the wrong place. Before concluding a failure, always check the ACCESSIBILITY SETTINGS (« slow keys, » « bounce keys, » or « sticky keys » sometimes activate by mistake and give the impression of a broken keyboard), the LOCKS, and the LAYOUT (if the keys type the wrong characters, it’s a language setting, not a failure). Two major points of vigilance. First, the #1 danger for the keyboard: LIQUIDS. A spilled liquid seeps and can cause a short circuit; react in emergency — turn off immediately (even by forcing the shutdown), unplug, flip the device to drain the liquid, dry, and above all LET IT DRY FOR A LONG TIME (several days) before turning it back on (turning it back on too soon, while there’s still moisture, causes the fatal short circuit). In case of doubt, have the device examined before turning it back on. The best protection remains keeping drinks and food away from the keyboard. Then, if the keyboard remains permanently faulty despite all checks (and another keyboard works), it’s actually broken: an external keyboard is easily replaced, a built-in keyboard is repaired by a professional. Good news: a silent laptop keyboard never immobilizes the computer — plug in an external USB keyboard, it works immediately, depanns you, and confirms the diagnosis; keeping a cheap external keyboard on hand is a wise precaution. For a single silent key, it’s most often dirt underneath: clean it gently (without ever forcing). To prevent freezes: monitor the battery (wireless), maintain the cable (wired), clean regularly (crumbs, dust), keep liquids away, and keep the system up to date. In short, a silent keyboard is almost always a simple incident to solve — a battery to change, a cable to replug, a system to restart, a setting to correct; proceed methodically from the simplest to the most advanced, isolate the cause with the other keyboard test, and you’ll almost always find a functional keyboard. Only liquids require real urgency; for everything else, keep your calm and follow the method.