Firmware Change Update On Sony Kd-43x8309c [upd] File

Firmware Change Update Report

Device: SONY BRAVIA KD-43X8309C
Region: Europe / UK (Model variant)
Platform: Android TV (Mediatek MT5890)
Report Date: [Current Date]

Method 2: USB Drive Installation (Recommended)

Prerequisites: A USB 2.0 or 3.0 drive formatted to FAT32 (not exFAT or NTFS), at least 2GB capacity. Firmware Change Update on SONY KD-43X8309C

Step-by-Step Guide:

  1. Go to the Sony Support UK website (search "Sony UK KD-43X8309C firmware").
  2. Download the latest firmware file (e.g., sony_atvotafull_2016__xxxxxxxx.zip).
  3. Extract the ZIP file. Inside, look for a folder named sony_dtv0FA30_xxxxxxxx.
  4. Copy the entire folder to the root of your USB drive. Do not rename it.
  5. Power off your TV completely (not standby). Unplug the power cord for 60 seconds.
  6. Plug the USB drive into the TV’s USB 1 port (the blue one, if available).
  7. Plug the TV power back in.
  8. Press and hold the POWER button on the TV’s physical joystick (located on the left back panel) while pressing the VOLUME DOWN button on the remote. Hold until a green LED flashes.
  9. Release. The TV will show “Updating software…” on a black screen.
  10. Crucial: Do not unplug or turn off the TV for at least 30 minutes. The screen may go dark (this is normal during partition resizing).
  11. When the update finishes, the TV will reboot twice. Remove the USB drive.

2. Summary of Last Major Changes (from PKG 5.xxx to 6.724.0318)

| Area | Change Description | |------|--------------------| | OS Upgrade | Android 5.1.1 Lollipop → Android 7.0 Nougat | | User Interface | Updated Sony Home Launcher (newer layout, better customization) | | Performance | Improved app switching stability; reduced Wi-Fi dropouts | | Video Playback | Fix for 4K HDR content stuttering on USB/HDMI | | Audio | Resolved lip-sync issues with ARC and external soundbars | | Network | Fixed intermittent Wi-Fi disconnects on 5GHz bands | | Security | Patches for KRACK WPA2 vulnerability & BroadPwn | | App Support | Enabled newer versions of BBC iPlayer, YouTube, Netflix (HDR) | Go to the Sony Support UK website (search

2. Detailed Change Log: What Actually Changes?

Unlike vague "bug fixes" notes, this firmware patch for the KD-43X8309C introduces tangible modifications. Here is the complete change log from Sony’s engineering release notes: Netflix (HDR) |

Issue: Wi-Fi keeps disconnecting.

Solution: Go to Settings → Network → Advanced → Turn off “IPv6”. The Marshmallow firmware has a known IPv6 bug.