Why is the Intel® NUC Kit Not Waking from Sleep State?

The Intel® NUC Kit works at first, but after a while it goes to sleep mode and it doesn't come back from it.

Steps to try when an Intel® NUC does not come back after going to sleep mode:

1. ​​​​​​If the issue occurred after any recent software update, Operating System update, or hardware or BIOS change, try to undo those changes.
2. If using Windows® Operating Systems, check the Power Options on Power Options/Plan settings on Control Panel.
3. Try using a different cable or connection type.
4. Check the Power Settings/Eco Mode on the TV/Monitor. For instructions on how to check these settings, contact the TV/Monitor manufacturer.
5. Load defaults settings in the NUC's BIOS:
   1. Press F2 during boot to enter BIOS Setup.
   2. Press F9 to set defaults.
   3. Press F10 to save and exit BIOS.
6. If loading defaults BIOS does not help, check the power sleep states on the NUC.

   Go to the BIOS and check the following settings:

   1. Advanced > Devices > Onboard Devices > Auto Turn On TV > Select From S3/S4/S5 Boot.
      TV turns on when Intel® NUC is powered on or resumes from S3/S4/S5 state.
   2. Advanced > Power > Secondary Power Settings (Right Section) > Deep S4/S5 > Select Disabled.
      Disable to allow to wake up from other methods besides the power button.
   3. Advanced > Power > Secondary Power Settings (Right Section) > USB S4/S5 Power > Enabled.
      Enable the USB Port power in S4/S5 state.
   4. Advanced > Power > Secondary Power Settings (Right Section) > Wake on USB from S5 > Enabled.
      Enable Wake on USB from S5 state.
   For more information regarding Intel NUC's BIOS settings, refer to BIOS Settings Glossary for Intel® NUC.
7. Check correct voltage memory: Use the correct voltage memory modules for your Intel NUC. To find the memory requirement for your Intel NUC, go to System Memory Information for Intel® NUC Products.
8. Check with the TV/monitor manufacturer for firmware updates that might help to solve the issue.
9. Test the NUC with minimal configuration by removing all non-necessary components like USB devices, external hard drives, adapters and use only wired mouse and keyboard. This may help to diagnose if the issue is related to a particular component connected to the NUC.
10. Uncheck or Check the Turn on fast startup in the Shutdown settings section.
11. Install the Latest Graphics driver for the NUC. You can download the latest HD Graphics from the Download Center.
12. Update the BIOS to the latest version. 
13. Perform a clean install of the OS.

If further assistance is needed, Contact Intel Support.