Reason for high volume in right low in left

Solution
Try using the headphones on another source. If the problem persists the headphones are bad. Could be a problem with the plug or with the speakers in the headphones. Unless they are expensive it's cheaper to just replace them unless you want to use them as a learning experience.
If the problem goes away then whatever you are plugging them into is has the left right levels or balance mis-adjusted or is broken.
Try using the headphones on another source. If the problem persists the headphones are bad. Could be a problem with the plug or with the speakers in the headphones. Unless they are expensive it's cheaper to just replace them unless you want to use them as a learning experience.
If the problem goes away then whatever you are plugging them into is has the left right levels or balance mis-adjusted or is broken.
 
Solution