What Am I Using?
Computer won’t turn on?
Use lights, fans and startup sounds to distinguish no power from no display. Find what to check before contacting device support.
Do any lights, fans or sounds start when you press power?
Use the correct charger or power cable and a known working outlet. Check for obvious damage first.
Device and operating system
Check whether the display is the missing part
The computer may have power even when there is no picture.
- Check brightness, the monitor power and the selected input. Try the built-in screen or an already available working display.
- Record repeating lights or beeps exactly. Use the device maker’s interpretation for your model.
Check the basic power path
A battery with no usable charge or a failed power connection can leave the device unresponsive.
- Use a compatible charger directly in a working outlet. Allow a depleted battery time to charge according to the manual.
- Disconnect optional accessories and try once more. Arrange service if there is still no response.
Record the power-on signal
Blink patterns and warning screens are specific to the device model.
- Write down the exact model and pattern or take a photo of the warning.
- Check the manufacturer’s support page or contact service. Stop testing if you notice swelling, smoke or a burning smell.