Sometimes, when you apply a new Rom to your device, the Rom developer may put in a custom tone for when you boot up or shut down. Sometimes that sound isn’t really wanted by the end user. If you have one that you would rather not hear, here’s how to remove it. As with most other system mods/changes, your device must have root access; continuing on, I assume that you have root privileges on your S5 as well as superuser permissions granted correctly.