1, use the elimination method, the current only one side of the sound headset into other devices, or use other headphones into the current use of equipment, check whether the device or the headset is the reason;
2, if it is the reason of headphones, it is recommended to replace one; If it is the reason of the equipment, you can try to use alcohol and cotton swabs to clean the headphone hole. If it is still unable to use, you can only repair and replace the headphone hole.
3, you can also try to turn the plug or the branch, whether the headset will be good or bad sound, if yes, it may be the silent side of the headset wire there is a break in the wire or the plug and the metal parts in the headset hole poor contact, if there are warranty suggestions to contact after-sales maintenance, if the price of the headset is cheaper, it is recommended to replace it directly.