SHENZHEN ITA TOUCH TECHNOLOGY CO., LTD
The video will teach you how to replace it. as the following steps,
1. Open the protected corner of interactive whiteboard
2. After opening the corner, you will see a connecting board, please disconnect it.
3. Please pull up the plastic module with PCB.
4. Remove the fixed screw on infrared touch screen frame
5. Please pull out the PCB from the plastic module of the touch frame.
6. Pull the PCB until seeing the 1st connecting of infrared PCB
7. Please disconnect the latest data cable.
8. Find the good PCB, replace it per above opposite steps, and assemble well.