Laptop Won't Turn On? A Calm, Step-by-Step Guide

01Quick answer

When a laptop won’t turn on, the most common causes are a completely flat battery, a charger that isn’t delivering power, or a laptop that is actually running but showing a black screen. Start by charging it for a while with its own charger from a known-good outlet, then try a forced restart by holding the power button. This guide helps Windows laptop and MacBook owners work out which problem they have and what to try safely.

02Before you start

• Work out what you’re seeing. No lights or sound at all is a power problem. Lights, fan noise or keyboard backlight but a dark screen is a display or startup problem. A logo that appears and then disappears is a startup problem.
• Unplug accessories. Remove USB drives, docks, memory cards and external disks. Some laptops try to start from a connected drive.
• Don’t open the laptop. Batteries and internal parts aren’t safe to handle without proper training and tools.
• If the laptop has had a spill, don’t power it on. Unplug it and get professional help.

03Why this happens

Usually simple to fix:

• The battery has drained completely and needs time on the charger before it responds.
• The charger, cable or wall outlet isn’t working, or a charger from another device doesn’t supply enough power.
• The laptop is stuck in a sleep or hibernation state and needs a forced restart.
• The screen brightness is turned right down, or the picture is going to an external display.
• A recent update or connected device is interrupting startup.

Needs the manufacturer or a repair service:

• No lights or response at all with a known-good original charger after a long charge.
• The battery is swollen or the laptop gets hot without starting.
• The laptop shows signs of liquid damage or a cracked case.
• Startup repair and recovery options can’t get Windows or macOS running again.

04Check the power first

1. Plug in the laptop’s own charger to a wall outlet you know works, such as one where a lamp works. Avoid extension strips while testing.
2. Check the charger’s light, if it has one, and the charging light on the laptop. Inspect the cable for kinks, fraying or a loose connector. Don’t use a damaged charger.
3. Leave it to charge. A completely drained battery may need a while on the charger before the laptop responds. Leave it plugged in, then try the power button again.

   Did it start? If yes, let it charge fully. If it’s often running flat unexpectedly, see our guide to a laptop that won’t charge.

4. For USB-C chargers, try the other USB-C port if the laptop has more than one. Some laptops charge from only one specific port; your manual will say.

05Try a forced restart

1. Hold the power button down for around 15 to 20 seconds, then release it. This forces a full shutdown if the laptop was stuck. Check your manual for the exact method on your model.
2. Press the power button normally to start it.

   What you should see: a manufacturer or Apple logo, or the Windows loading screen. If you see that, the laptop is starting.

3. On some Mac laptops, Apple describes resetting the SMC (System Management Controller, which handles power and battery behaviour). The steps depend on the model, and Macs with Apple silicon don’t need it; Apple’s support page explains which applies to yours.

06If it powers on but the screen stays dark

1. Turn up the brightness using the brightness keys on the keyboard.
2. On Windows, press the Windows key, Ctrl, Shift and B together. This restarts the display driver; you may hear a short beep and the screen may flicker.
3. Connect an external monitor or TV. If the picture appears there, the laptop works and the problem is the built-in screen or its connection, which needs a repair service.
4. If Windows starts but keeps failing, it may offer automatic repair or recovery options. Microsoft’s recovery options page explains what each one does. Back up first if you can reach your files; our backup guide shows how.

07Common mistakes to avoid

• Using a phone charger or a low-power USB-C charger and expecting a flat laptop to start.
• Pressing the power button repeatedly without waiting, which can confuse the startup.
• Choosing a full reset straight away. A reset can erase apps and files; try everything else and back up first.
• Opening the case or removing a built-in battery.
• Starting a laptop that is hot, swollen or has had a spill.

08If it still doesn’t work

If the laptop shows no sign of life after a long charge with its original charger and a forced restart, or if it keeps shutting down straight after starting, contact the manufacturer through its official support website or a qualified repair service. A laptop that runs hot even when barely in use may have a cooling problem; our overheating guide explains the warning signs.

Have ready the make, model and serial number from the label, what you see and hear when you press the power button, and what you have already tried.

09The short version

Charge it with its own charger from a working outlet, remove accessories, then hold the power button to force a restart. If it runs but the screen is dark, try the brightness keys and an external monitor. No response at all, swelling or heat means it’s time for the manufacturer or a repair service.

10FAQ

Why is my laptop on but the screen is black?

The laptop may be running with the brightness turned down, the picture going to another display, or a display driver that needs restarting. Try the brightness keys, the Windows key with Ctrl, Shift and B on Windows, and an external monitor to narrow it down.

How long should I charge a dead laptop before it turns on?

It varies by model and battery. Leave it on its own charger for a good while before deciding it won’t start. If the charging light never comes on, the charger or charging port may be the problem.

Will a forced restart delete my files?

No. Holding the power button only switches the laptop off. You might lose unsaved changes in open documents, but saved files stay where they are.

Can a laptop battery stop a laptop from turning on even when plugged in?

Yes, on some models a battery that has failed can prevent startup. If the laptop doesn’t respond with a known-good charger, a repair service or the manufacturer can test the battery safely.