Try to do this steps. First, look for the 2 screws holding the front speaker cover on. Keep in mind that there are plugs covering the screws so you need to take it out first. Then, you need to unscrew and remove the speaker cover. Once it has been removed, look down and you will see 6 screw like adjusters with a white painted mark, do not touch the top row. Use a screwdriver to slightly turn it counterclockwise. If this can't be done, ask a repairman or someone who can do this to help you.