1. Create a new "GM9907-L2"or"GM9907-LD" (depend on which software embedded in GM9907) folder in the USB;
Save the file named “GM9907-L-Upload.gm” into this folder;
Plug the USB into the port of GM9907, There is a “System Tips” windows popping up on the main screen automatically, showing “Update Firmware” and “Change Logo screen”.
As the following picture1 shows (GM9907-L2):
Picture1: System Tips Window
2. Choose "Update Firmware" and click “Enter” below. Then the system will be under upgrading and the window shows "Loading file, please wait. Do not power-off or disconnect USB device". After that, a progress bar will appear. When the progress bar finished, the controller will be automatically restarted. The upgrade is completed, which takes about 55 seconds.
Picture2: System Tips Window2