I hope this information can be helpful to you. Restart the computer and check if it helps.Ībove are three ways that I find on the Internet to fix the problem 'Windows 8.1 refuses to sleep'.Type 'powercfg.exe/hibernate off' in the command line.If your Windows 8.1 PC still can't sleep, try 'powercfg.exe/hibernate off' to see whether it can help you.If your Windows 8.1 PC still can't sleep, try 'powercfg.exe/hibernate off' to see whether it can help you. Scroll down to find 'Power buttons and lid' option and click the + (plus) sign next to 'Sleep button action' to verify the action is really set to Sleep. The Edit Plan Settings box will pop out.Press Enter and click 'Change plan settings' in Power Options. Go to the Start Screen and type 'power options' in the search box.It is usually workable to put the computer to sleep by clicking Sleep, but sometimes the settings may change. All the sleep mode settings are in good condition, but you are still unable to make the sleep mode work normally, or the sleep mode is missing as before, go about doing the following procedures. when the troubleshooting has been completed, you can click Close. For example, once you have set putting the computer Never to sleep, of course, the sleep mode cannot work or the sleep mode is missing on Windows 10.And this will start the automatic detection and fixing of issues. In the Power Troubleshooter, click Next option.Click Power option, which will launch the Power Troubleshooter.After entering Troubleshooting, tap on 'View all' on the left side.

Then click Troubleshooting in the listed results.

Press Windows key + W and type 'troubleshooting' in the search box.

You can run it to adjust your computer's power settings. The Power Troubleshooter checks things like the computer's timeout settings, which determine how long the computer waits before turning off the monitor display or entering sleep mode. Fix 'Windows 8.1 Won't Sleep' via Power Troubleshooter In this part, I will introduce you three main methods that can be used to solve the problem 'Windows 8.1 PC will not sleep'. How to Fix Sleep Mode Not Working in Windows 8.1

Windows 10 screen sleep not working