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Likely fix

Fix: Laptop turns on then off again

A laptop that turns on then immediately shuts off may have a deeply discharged battery, overheating protection, bad charger, memory issue, or internal hardware fault.

Quick answer

Disconnect accessories, plug in the correct charger, let it charge, then try a power reset. If it keeps shutting off, watch for heat, beeps, or flashing light codes.

Important warning

If the laptop shuts off because it is overheating, repeatedly turning it on can make the problem worse.

Try this

  1. 1 Disconnect all accessories.
  2. 2 Plug in the original or correct-wattage charger.
  3. 3 Leave it charging for 15–30 minutes.
  4. 4 Hold the power button for 10–15 seconds.
  5. 5 Try turning it on again.
  6. 6 Check whether the laptop feels very hot.
  7. 7 Listen for beep codes or watch for flashing lights.
  8. 8 If it shuts off every time, it may need hardware diagnosis.

Common causes

Battery is deeply discharged.

Charger does not provide enough power.

Laptop is overheating.

Memory or internal hardware fault.

Shorted USB device or accessory.

What to check next

  • Check whether it stays on with the charger connected.
  • Check whether it turns off at the same point every time.
  • Check whether it feels hot.
  • Check whether lights flash in a pattern.
  • Check whether removing all accessories changes anything.

FAQ

Why does my laptop turn on then shut off?

It may be protecting itself from overheating, failing a hardware check, running out of battery immediately, or not getting enough power from the charger.

Can a weak charger make a laptop turn off?

Yes. If the charger cannot provide enough wattage, the laptop may fail to start or shut down under load.

What do flashing lights mean?

Many laptops use flashing lights as hardware diagnostic codes. The meaning depends on the laptop brand and model.

Related fixes

Fix: Basic laptop power reset

A laptop can get stuck in a frozen sleep or power state. A power reset clears that state without opening the laptop.

Fix: Laptop has no charging light

No charging light usually means the laptop is not receiving power, the charger or cable is bad, the outlet is off, the USB-C port does not accept charging, or the laptop has a hardware power issue.

Fix: MacBook won’t turn on

A MacBook that will not turn on may be deeply discharged, stuck in a power state, using a weak charger, connected to a problematic accessory, or showing a black screen while actually running.

Fix: Laptop charging light is on but it won’t turn on

If the charging light appears but the laptop will not start, the laptop may be stuck in a power state, deeply discharged, connected to a problematic accessory, or failing during startup.

Fix: Laptop overheated and won’t turn on

A laptop may refuse to turn on after overheating until it cools down. Blocked vents, dust, heavy apps, bad fans, or thermal problems can cause this.

Fix: Laptop turns on but screen is black

A laptop that turns on with a black screen may have a display brightness issue, stuck sleep state, bad graphics output, failed internal screen, or external monitor mode problem.