The sleep LED may be pulsing, but there isn't enough power from the battery to start the hard drive and power the display. What if you forget the power adapter is not plugged in? If your battery expires while your machine is sleeping with the power adapter not plugged in, your machine may have difficulty waking.
#Put screen to sleep software
![put screen to sleep put screen to sleep](https://regmedia.co.uk/2011/05/26/kindle_hack_3.jpg)
We save a lot of time in our lives not waiting for our devices to shut down and start back up, but we should not make putting our machines to sleep all the time our modus operandi.
![put screen to sleep put screen to sleep](https://tcn.tidbits.com/wp-content/uploads/2017/05/Sleep-Energy-Saver-1024x686.png)
It's convenient to close the lid of our laptops, go to a meeting, return, and open the laptops to be right where we left off without having to wait for our machines to boot.