If your laptop won't power on, even when it's plugged in could have a faulty power supply, motherboard, video card or RAM. Ensure the plug to the power cord is plugged into an outlet and to the computer. Check the laptop's battery and power connector to make sure the connection hasn't come loose.
There are some troubleshooting tips that you can try for [link|https://www.minitool.com/data-recovery/fix-my-laptop-wont-turn-on-009.html|fixing laptop/computer won’t turn on].