1. Product Overview
This document provides instructions for the HKC TG34C3U Driver Main Board, featuring the MST9835RN-C chipset. This board is a replacement component for compatible HKC TG34C3U monitors, designed to restore or repair display functionality. Please note that these boards are typically used and thoroughly tested before shipment to ensure functionality.

Figure 1: Front view of the HKC TG34C3U driver main board.
2. Safety Information
Before handling or installing the driver board, please observe the following safety precautions:
- Always disconnect power from the monitor and any connected devices before beginning installation or maintenance.
- Wear anti-static gloves or use an anti-static wrist strap to prevent electrostatic discharge (ESD) damage to sensitive electronic components.
- Handle the board by its edges to avoid touching components or connectors.
- Ensure proper ventilation during operation of the monitor after installation.
- If you are not comfortable with electronic repairs, seek assistance from a qualified technician.
3. Setup and Installation
This driver board is intended as a replacement part. Installation typically involves disassembling the monitor to access the existing main board and replacing it with this unit. Due to the technical nature of this process, professional installation is highly recommended.
3.1 Compatibility Check
Ensure that the model number of your monitor (HKC TG34C3U) and the original board's specifications match this replacement board. There may be variations in specific board revisions or connector configurations (sometimes referred to as "Coccygeal vertebra number"); while boards with different numbers often function identically, if you require an exact match, please verify before installation.
3.2 Installation Steps (General Guidance)
- Power Disconnection: Unplug the monitor from the power outlet and disconnect all cables.
- Monitor Disassembly: Carefully open the monitor casing. Refer to your monitor's service manual for specific disassembly instructions.
- Locate and Remove Old Board: Identify the existing driver main board. Disconnect all ribbon cables, power cables, and other connectors attached to it. Note their orientation and connection points.
- Install New Board: Gently place the new HKC TG34C3U driver main board into position.
- Reconnect Cables: Reconnect all cables and connectors to the new board, ensuring they are securely seated and correctly oriented. Pay close attention to delicate ribbon cables.
- Reassemble Monitor: Carefully reassemble the monitor casing.
- Initial Power-Up: Connect the power cable and a video source. Power on the monitor to test functionality.
Note: Incorrect installation can damage the board or the monitor. If you are unsure, consult a professional.
4. Operating Instructions
Once correctly installed, the driver main board operates as an integral part of your HKC TG34C3U monitor. No specific user interaction is required with the board itself. The monitor's normal functions (power on/off, input selection, display settings) will be controlled via the monitor's existing buttons or remote control.
Ensure all external connections (power, HDMI, DisplayPort, etc.) are secure for optimal performance.
5. Maintenance
The driver main board requires minimal maintenance. To ensure its longevity and proper function:
- Keep Dry: Avoid exposing the monitor or board to moisture or high humidity.
- Dust Control: Periodically clean the interior of the monitor (if comfortable with disassembly) to remove dust buildup, which can impede cooling and cause component failure. Use compressed air or a soft brush.
- Temperature: Operate the monitor within its recommended environmental temperature range to prevent overheating.
- Avoid Physical Shock: Protect the monitor from drops or impacts.
6. Troubleshooting
If you encounter issues after installing the driver main board, consider the following:
6.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Monitor does not power on. | Loose power connection, faulty power supply, incorrect board installation. | Check all power connections. Ensure the board is seated correctly. Test with a known good power supply if possible. |
| No display/blank screen. | Loose video cable, incorrect input selected, faulty ribbon cable connection. | Verify video cable connections (HDMI, DisplayPort). Ensure correct input is selected on the monitor. Recheck all ribbon cable connections on the board. |
| Distorted image or colors. | Loose or damaged ribbon cable, panel issue, board defect. | Carefully re-seat all ribbon cables. If the issue persists, the display panel itself or the board might be faulty. |
| Minor cosmetic imperfections (scratches, dust). | Normal for used components. | These are typical for used boards and do not affect functionality. No action required unless functionality is impaired. |
6.2 Faulty Product Upon Receipt
If the product is faulty upon receipt or during shipping, please inform the seller immediately. All products are tested before shipment to minimize such occurrences.
7. Specifications
| Feature | Detail |
|---|---|
| Product Type | Panel LCD Combo (Driver Main Board) |
| Compatible Monitor Model | HKC TG34C3U |
| Main Chipset | MST9835RN-C |
| Condition | Used & Tested (no new parts) |
| Origin | Mainland China |
| Approximate Dimensions (L x W x H) | 25 cm x 23 cm x 5 cm |
| Approximate Weight | 0.15 kg |
8. User Tips
While no specific user reviews or Q&A were available for this product, general tips for handling and installing electronic components include:
- Documentation: Always refer to your monitor's original service manual or diagrams for precise disassembly and reassembly instructions.
- Photography: Take photos of cable connections before disconnecting them to aid in reassembly.
- Cleanliness: Keep your workspace clean and organized to prevent losing small screws or components.
- Patience: Electronic repairs require patience and attention to detail. Do not rush the process.
9. Warranty and Support
This product comes with a three-month guarantee period from the date of receipt. If you experience any quality problems within this period, please contact the seller for assistance. The seller may offer goods exchange or maintenance services.
Seller Information:
- Store Name: Wowo Electronic Accessories Store
- Store Rating: 4.6 out of 5
- Communication Rating: 4.3 out of 5
- Positive Feedback Rate: 84.3%
For support, please reach out to the seller directly through the platform where the purchase was made.





