LG / Vizio 55.42T23.D02 (T320HVN01.1) LED Driver Board

Location: 00o5

This replacement LED driver board is designed for LED-backlit LG and Vizio televisions that use part number 55.42T23.D02. The LED driver controls the power and brightness of the backlight strips and is a common replacement when the TV powers on but the screen remains dark, dim, or flickering.

Part & Board Numbers

• Part Number: 55.42T23.D02
• Board / Printed Numbers:
  • T320HVN01.1

Always match the part number on your original board. Using the wrong LED driver can result in no backlight or improper operation.

Compatible TV Models

• LG 42LS5700-UA
• Vizio M420SL
• Other models that use 55.42T23.D02 or T320HVN01.1 may also be compatible.

Common Symptoms of a Bad LED Driver

• TV powers on but the screen is dark
• Very dim picture or faint image visible only with a flashlight
• Backlight flickers or fails to stay on
• Intermittent or uneven brightness

These symptoms can also come from failing LED strips or a power supply. Proper diagnosis is recommended.

Installation & Handling Notes

• Unplug the TV and allow several minutes for capacitors to discharge before opening it.
• Use anti-static precautions when handling electronic boards.
• Carefully reconnect all ribbon cables and harnesses; ensure they are fully seated.
• Avoid bending the board or applying excessive force to connectors.

Condition & Testing

• Professionally tested and confirmed fully functional.
• Guaranteed working replacement for the listed part numbers.

Warranty & Returns

• Warranty: 180-Day Warranty.
• Returns accepted for boards that are unmodified, undamaged, and installed properly.
• Please keep your original board until the repair is confirmed successful.

Shipping

• Ships from Brighton, TN.
• Securely packaged for safe transit.
• Expedited shipping options available at checkout.

If you need help confirming compatibility with your TV model, feel free to contact us before ordering.