Hi,
- What steps have you performed in an attempt to resolve the issue?
I'd suggest you follow these steps and check if the issue persists.
Step 1:
Open the Playing Audio troubleshooter
http://windows.microsoft.com/en-us/windows7/Open-the-Playing-Audio-troubleshooter
Step 2:
a. Click Start type Sound in the Start Search box.
b. Click Sound in the search results at the top of the Start menu.
c. Click the Playback tab. Notice the check mark next to the default device. For most
users, the default device is Speakers or headphones. You may select headphones as the device.
e. Click the Properties button, then select the Levels tab, and make sure that the volume
is at 100 and not muted.
f. Now click on the button Balance present in front of headphones option. Now change the balance settings for the left and right. You may keep number equal for both left and right.
g. Click OK to save your settings and to close the Sound dialog box. Check if this resolves the issue.
Step 3:
Try enabling microphone boost and check if the issue persists.
a. Right-click the speaker icon on the system tray (bottom right corner of the screen).
b. Select Recording devices.
c. Select the headphone and click on Properties button.
d. In the pop-up window, click on Custom tab.
e. Place a check mark for Microphone Boost and click on OK button.