Steps to flash BIOS：
1. Please try to format your USB pen drive in FAT32 format
2. Unzip H234B302.zip and copy all the files into your USB pen drive
3. Boot from USB pen drive and run update.nsh to flash the BIOS automatically. 
4. After the update is completed, please unplug the power supply and then wait for 5 seconds before you reconnect the power supply.
