If your laptop cannot find the operating system, it usually displays a message such as No bootable device found or Insert boot media. This indicates a failure of the storage device (HDD or SSD) itself ...
Power on your computer over the internet with WoL, or use your keyboard Enable Wake-on-LAN, then use an app like TeamViewer to trigger the startup over the internet. Another method is to turn a key ...
1] Is your laptop fully charged? This is the first thing that you should do. Check if your laptop is fully charged or not. If the battery of your laptop is drained out completely, it will not turn on.