Reason Analysis:
The shutdown action of the Win8.1 system is performed by default to deep sleep, instead of a full shutdown, the "Play Windows Startup Sound" setting is checked, the "Enable Quick Start" feature is not canceled, so the computer performs a wake from the deep sleep, not a shutdown reboot, so the startup sound cannot be heard.
Solution:
1, in the System desktop, left click on the lower right corner of the system with the "Battery" icon, the following interface, select more "Power Options";
2, pop-up "Power Options" interface, as shown in the following figure, click "Select the function of the power button";
3, in the pop-up interface, found that some of the options can not be changed, first click "Change currently unavailable settings";
4. Options that could not be selected before can be changed, you can see the "Enable Quick Launch (recommended)" option (the system opens by default), uncheck "Enable Quick Launch", and "save changes."
win8.1 into the system does not play the boot music solution to share here, restart the computer will have a sound.