The method: 1. Extract the firmware "dso5kb_func_xxxxxxxxxxxxx.up" into the root directory of an U-disk which is in FAT32 format. (It's better the U-disk is an empty disk, otherwise, there might be errors). 2. Press the button "Utility" on the front panel. 3. Press "F2" to choose "Update Firmware" 4. Insert the U-disk into the USB-port under the screen. 5. Press "F5" to confirm