---
title: Replacing the Hub Board on CommBox Gen 2 LED Board
description: Step-by-step guide to replacing a faulty hub board on your CommBox Gen 2 LED board. Includes disassembly, installation, and troubleshooting.
---

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# Replacing the Hub Board on CommBox Gen 2 LED Board

## Learn how to replace a faulty hub board on the CommBox Gen 2 LED board to resolve display or connection issues.

**Applies To**  
CommBox LED Board Gen 2 Elite & Ultra Series (120”, 138”, 150”, 165”, 180” models)

**Step-by-Step Instructions**

1. **Identify the Faulty Cabinet**
   
     - Inspect the display for abnormal sections such as black areas or persistent image errors.
     - Locate the cabinet containing the issue by referencing calibration numbers or visually checking.
2. **Remove LED Modules from the Cabinet**
   
     - Use the front maintenance magnetic or suction tool to remove all LED modules from the faulty cabinet.
     - Set modules aside carefully to avoid damage.
3. **Disconnect Power and Signal Cables**
   
     - Unplug the power cable and the FFC (Flat Flexible Cable) from the faulty cabinet for safety.
4. **Remove the Hub Board**
   
     - Unscrew the 10 screws securing the hub board to the cabinet.
     - Carefully lift and remove the faulty 3-in-1 hub board.
5. **Install the New Hub Board**
   
     - Place the new hub board into the cabinet, aligning it correctly with mounting holes and connectors.
     - Secure it with the 10 screws removed earlier.
6. **Reconnect Cables**
   
     - Reconnect the power cable and signal FFC cable firmly to the new hub board.
7. **Reinstall LED Modules**
   
     - Align and gently press each LED module back into its original position, matching calibration numbers for uniform brightness and colour consistency.
8. **Test the Screen**
   
     - Power on the screen; verify that the display area previously showing issues now displays normally.

**Troubleshooting / What to Do If It Doesn’t Work**

- **Screen Section Still Not Displaying Correctly:** Double-check hub board connections and ensure cables are seated securely.
- **Modules Not Lighting Up After Replacement:** Confirm proper orientation of LED modules; reseat if necessary.
- **Persistent Errors or No Improvement:** Consider replacing signal cables or contact support.
- If problems persist, log a ticket on the Support Portal.

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