A computer that will not turn on is alarming, but most of the time the cause is something simple. Work through these steps before concluding that something is seriously wrong with the hardware.
For desktops
- Check the power cable. Make sure the cable is firmly seated at both ends. If it is plugged into a power strip or surge protector, verify that the strip is turned on and the breaker has not tripped.
- Try a different outlet. Plug a lamp or another device into the same outlet to confirm it is working.
- Check for lights or sounds. Does anything light up when you press the power button? Do you hear fans spin briefly? Any response at all narrows down the cause.
- Check the monitor separately. If you hear the computer start but see nothing on screen, the monitor may be the issue rather than the computer.
- Check for overheating. If the computer ran hot recently or shut off unexpectedly before this, it may have a cooling problem preventing startup.
For laptops
- Plug in the charger and wait. A fully drained battery sometimes needs a few minutes of charging before the laptop will respond at all.
- Try a power reset. Disconnect the charger, hold the power button for 30 seconds, then reconnect the charger and try again. This discharges any residual power and can resolve a frozen power state.
- Check the charger. Try a different outlet. If the laptop charges via USB-C, try a different cable or charger.
- Check for charging indicator lights. A light that flashes or blinks a specific pattern may indicate a battery or charging issue.
When to bring it in
If the computer shows no response at all despite working through these steps, or if it starts but shuts off immediately, there is a hardware issue that requires diagnosis. A failed power supply, dead battery, or failed motherboard component will not be fixed by a simple restart. Bring it in for a professional diagnostic before the situation changes.
