D4 PRO firmware upgrade

Instructions for D4 PRO firmware upgrade

O-NOORUS D4PRO_firmware_V1.1.2 Download

Note: Upgrade is only possible if the current Bluetooth name is :       O-NOORUS D4PRO BT5.4B

 

1. Prepare a USB flash drive, a USB flash drive extension cable, and a USB flash drive with a FAT32 file system.

2. Download the firmware to your PC, extract the RAR file, and copy  D4PRO_firmware_V1.1.2.MVA to the USB flash drive.

3. Switch the D4PRO to USB input and insert the USB flash drive control cable. Automatic upgrade will begin.

4. After the upgrade is complete, it will automatically switch to Bluetooth input, and the Bluetooth icon will light up. indicating a successful upgrade.