First, please download the upgrade file, then upgrading projector as below steps:

1. Extract the file to the root directory of U disk. (Do not make any changes)

2. Insert U disk into the normal work projector through USB white port. (USB 2.0)

3. Standby mode (Not yet turned on). Press the start button 2 times, at second time, hold down the start button maintain for about 5 seconds to see a blue screen menu shows the progress of OK, then can be released. It will enter standby mode automatically after the upgrade is completed.

4. Reboot 2 times after the upgrade is completed. At the first time it will take a short time to enter standby mode automatically, then the second boot can be used normally. (The second boot time will take about 5 minutes).