A: First, determine whether the issue lies with the module or the cabinet. You can try replacing the cabinet or the module to verify the problem: 
Cabinet issue
For cabinet issues, possible problems include damage to the monitoring board, cabinet signal lines, and aviation connectors. Conduct a thorough inspection and replacement of each component;
Module issues
Check if the indicator lights on the module are on. 
If the module lights are not on:
1. The auxiliary power source is faulty.
2. There is a problem with the power supply from the auxiliary power source. Check the input terminals and related cables.
If the module light is on but flickers:
1. The control board and signal lines are damaged. They need to be checked and replaced.