Instructions for D4 firmware upgrade

Instructions for D4 firmware upgrade

O-NOORUS D4 firmware_V1.3 Download

If you encounter problems during the upgrade, roll back to the previous version, O-NOORUS D4 firmware_V1.1

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 O-NOORUS D4 firmware_V1.2.MVA to the USB flash drive.

3. Switch the D4 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.

5. On your mobile device, the D4's Bluetooth name will display: O-NOORUS D4 BT5.3B, indicating a successful upgrade.

D4 Series Appearance Differences