You press the power button and nothing happens - no lights, no fan, no logo. Or the lights come on, but the screen stays black. Before assuming the worst, work through these checks. Many "dead" laptops come back with a charger fix or a hard reset.
First, which problem do you have?
| What you see | Most likely cause | Go to |
|---|---|---|
| No lights, no sound, nothing | Power: charger, battery, stuck state | Steps 1-4 |
| Lights or fan on, black screen | Display, sleep, or memory | Steps 5-7 |
| Logo appears, then it fails or loops | Windows can't start (not a power problem) | Windows won't boot |
Damaged cable, bent pin, burning smell or a hot, swollen brick? Stop using it and get a replacement charger from the maker.
A completely empty battery sometimes needs a while before the laptop can start, even with the charger plugged in. Leave it charging for 20-30 minutes, then press the power button once, firmly, for a second or two.
If the charging light doesn't come on at all, or it blinks in a pattern, see laptop battery not charging when plugged in. Many makers use blink patterns as error codes; the pattern's meaning is on your model's support page.
A hard reset clears a stuck power state. It doesn't touch your files.
Some laptops have their own method instead: a pinhole reset button on the bottom, or a key combination. Search your model's support page for "hard reset" or "power reset".
A faulty USB device, dock or SD card can stop a laptop from starting. Start it with only the charger connected. If it starts, reconnect accessories one by one to find the culprit.
If the power light, keyboard backlight or fan comes on but the screen stays black:
If it only starts to a black screen with a mouse pointer after you sign in, that's a Windows problem - see black screen after login.
A laptop that went to sleep and got stuck can look dead. Hold the power button for about 10 seconds until it's fully off, wait a few seconds, then press it again. If this keeps happening after sleep, see PC won't wake from sleep.
When a laptop can't start its hardware, it often signals why with beeps, flashing power/caps lock lights, or a coloured light pattern. Count them, then look them up on the maker's support page for your exact model. They typically point to memory, the battery, or the motherboard.
Most brands have a built-in hardware test you start with a key at power-on, before Windows loads - but the key and name differ between makers and models. Search your model's support page for "hardware diagnostics". If the test gives an error code, note it; the maker's support team will ask for it.
If the laptop got wet or fell, don't keep trying to turn it on. Unplug it, don't charge it, and take it to a repair shop - powering on with moisture inside can cause more damage.
If none of this works, the likely causes are the charger (cheapest fix - try a known-good one first), the charging port, the battery or the motherboard. Your files are usually safe on the drive: a technician can often copy them off even from a dead laptop. Check whether it's still under warranty before paying for a repair.
Plug in the charger and check its light and the laptop's charging light, leave it charging for 30 minutes, then do a hard reset: unplug it, hold the power button for 15-30 seconds, plug the charger back in and press the power button normally.
Not necessarily. Connect an external monitor or TV. If a picture appears there, the laptop works and the problem is the built-in screen or its connection. If nothing appears anywhere, it's more likely the memory, motherboard or a firmware problem.
Unplug the charger and any USB devices, remove the battery only if it's designed to be removed without tools, hold the power button for 15-30 seconds, then reconnect power and turn it on. Some makers use a different key combination or a pinhole reset button - check your model's support page.
Usually not. Files stay on the drive even if other parts fail. A repair shop can often copy them from the drive, which is one more reason to keep regular backups.
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