What should I do if I can't output sound when I reinstall the system front audio?

Just reinstalled the ghost system. When using the headset, there is no sound in the front audio jack, but the audio jack on the back of the chassis can output sound. Is this a bad contact and will not sound?
This is not hardware. The problem, just in our settings, is not set, the default setting may be that the sound card version is too low and does not conform to the current configuration. Need to update the graphics card driver. Then on the "Realtek high-definition audio manager", "disable the front panel jack detection" on the hook.
win7 If you encounter the same problem, the processing method is similar. Especially the original installation system, his integrated sound card driver is not "Realtek high-definition audio manager", we need to pay attention to.