What you want to ask is what should I do if there is an error in the SonyA7SIII camera system? When there is an error in the SonyA7SIII camera system, you can try the following steps to solve the problem:

1. Turn off the camera, take out the battery and memory card, and then insert the battery and memory card again.

2. Upgrade the camera firmware to the latest version to ensure that the system has the latest fixes.

3. Try to reset the system, which will restore the default settings of the camera. Select settings > initialization > initialize camera settings in the main menu.

None of the above steps can solve the problem. You can try to send the camera to an authorized service center for repair or replacement of parts. Please note that before doing anything, please make sure that you have backed up all the data in the memory card to avoid data loss.