The computer does not have a sound, prompt does not insert the speaker or headset what to do

The first step: we use the right key computer taskbar to the right of the "sound (S)" shown in the following figure.

Step two: When we get to the sound window, we click on the second tab to "Record" and you will see that the reminder microphone shows "not plugged in" and the line input also shows "not inserted" as shown in the following figure.

Step three: Okay, no matter how many of them go back to the first tab, "play," as shown in the Realtek HDMI Output display is not plugged in, the speaker display is not inserted,

The fourth step: thought this is the hardware problem, we start-> "Control Panel" Here we find "hardware and sound" as shown in the following figure.

Step Fifth: Then we find "Realtek HD Audio Manager" in "Hardware and sound" below the red box.

Sixth step: Then we click on the right red box "Jack Settings" and then "Disable the front panel jack detection" Tick, so we look at the above all show normal, headphones also have a sound.