You cannot turn the Active 3D Glasses on. (3D models only)

• Replace the battery. (Applies only to TDG-BT400A/BT500A.)
  
  1. Press the unlock button with the tip of a pen, etc., and take out the battery case.
     
  2. Replace the battery with a new one. After that, be sure to insert the battery case until it locks in place again.
     
     1. CR2025 (-) side