Go to Settings > System > About Machine . Look for:
DHD 4300 Head Unit Firmware – Patched Version Download & Installation Guide download firmware head unit dhd 4300 patched
Insert the USB drive into the 4-pin or 6-pin USB port of the DHD-4300. Power on the unit (or press the button with a pin). Go to Settings > System > About Machine
When installing the patched firmware, follow these general guidelines: Go to Settings >
Avoid random file-sharing sites. Use these trusted sources: