Step 1 Take out four screws from the bottom of the box Step 2 Take out one screw from this black knob, and then pull up the second argenteous knob as well. Just like the third picture.
Step 3 Use a pliers to loose the first knob
Step 4 Then you can open the box like this & check if any abnormal welding on components, if yes just remove the PCB and replace a new one. Step 5 In case any problem from the camera LED lights Use the screw driver to unscrew four screw to loose the board like this.
Step 6: After step 5 you will see like this: Step 7 The problem is mostly from this audion, just replace it and then install back everything, it will be OK.
