Lenovo IdeaPad L340-15API Does Not Power On

The power adapter for the device may not deliver power to your device for a few different reasons:

• The outlet your device is plugged into may not be delivering enough/any power through it. Try an outlet that you know to be functional.
• Make sure that the charger is free of damage and wear. Ensure cables are free of tears or frays, pins are straight, and metal connections are free of rust/corrosion.

Your laptop might not be turning on due to an internal battery cable being disconnected:

• Plug your device’s charging cord into your device. If the device doesn't start charging, check the side of your device that has the charging port. There should be a small led light that turns on when your device is plugged in.
• If the light does not turn on when you plug in your device, you could have a wire that is disconnected. If this is the case, move down to the “Dead Battery” section below for instructions.

A dead battery means that the battery has lost the ability to hold a charge, which means the laptop needs to be plugged in at all times. This is most likely due to the natural degradation process.

1. To first test the conditions of the battery, simply running a battery health report should help give an idea of what's happening.
2. To determine whether the laptop has a dead battery, charge the laptop for a couple of hours and monitor the on-screen battery level.
3. If after the charging period the charging cable is removed and the laptop immediately shuts down, the battery is likely at fault and needs replacement.

Disconnected internal cable:

• The screen of your laptop may not be turning on due to an internal video cable being disconnected:
• Try checking the inside of the laptop monitor and/or the motherboard for the video cable that should be connecting the two together in order for the display to work.
• If there is a loose or broken connection between the monitor and the motherboard via the video cable, try reconnecting it if it is not broken. If it is broken, you will need to replace the cable with a new one.

The screen of your laptop may not be turned on due to an issue with the laptop’s power supply or battery.

• Take a few simpler approaches first before you try something else. Try to ensure that the power cable is securely plugged into the wall. Try to make sure that the power outlet properly works with other electronic devices such as a lamp.
• Look for any lights that indicate that the PC is getting power from the charging cable. Try to turn on the PC by pressing the power button for a few seconds to see if it will turn on.
• If none of these simpler solutions work, your laptop may likely have a much more serious problem with its power. Check the sections on malfunctioning battery and faulty power chord for more information.