It is always recommended to check the Changhong Europe Service Center or the Changhong Global Support site first. You will likely need your TV's serial number to find the exact matching file.
If software doesn't fix the boot loop, check the 5V and 3.3V power rails on the mainboard, as failing LDO regulators are common in Changhong models. Download JUC7 820 00229436 1920x1080 Changhong part5 rar
Please provide your TV model number or panel type so we can help you find the exact firmware match. It is always recommended to check the Changhong
Release the button once you see an "Upgrading" progress bar or the indicator light starts flashing rapidly. during this time. Method B: The Menu Update (For Working TVs) Insert the USB drive while the TV is on. Go to Menu > Settings > Software Update (or System Update). Select USB Upgrade and confirm. Troubleshooting Please provide your TV model number or panel