A laptop has several phases of “just won’t start.” The problem is compounded because a laptop has two power sources: When AC isn’t available, electricity is drawn from the laptop’s battery. So you know immediately that when the laptop doesn’t turn on right away, you have a power supply issue. If the laptop appears dead, you have a power supply issue. Here’s how to troubleshoot:
- Check to ensure that the laptop is plugged in
- Check to ensure that the battery is properly installed
- Press the power button for at least 5 seconds until all lights on the laptop go off. Now try starting it up as normal.
- Try removing the battery to run the laptop from just the AC power. If it works, you may have a defective battery that needs replacing or occasionally laptop batteries cause this glitch.
- If the battery is not accessible then leave the AC power unplugged until the battery goes flat or take your laptop to a service repair center for them to access the battery internally.
- Plug an external monitor into the laptop’s monitor port. If the external monitor works, the problem is with the laptop’s display only, not with the laptop’s display adapter or other internal hardware. Because the laptop and monitor are the same thing, fixing the monitor (or the display adapter) involves replacing major laptop components. You must return the laptop to the manufacturer for repair.