How to Update and Upgrade Skyworth 43STD4000 Software and Firmware? | Casting and A2Z Local Channel Problem


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This will fix the A2Z local channel no sound and casting problem on your Skyworth 43STD4000 Coolita Smart TV. This issue are as follows, Android mobile phone can't connect or hard to connect to the TV using Casting feature and no sound on A2Z local channel. Not limited to, but it extend the problem with iPhone Airplay feature via Access Point.

43STD4000 Actual Image

Tools Needed:

  1. 16GB USB Flash Drive (Fat32)
  2. Laptop or Desktop Computer
  3. WinRAR
  4. Software: Security (736MB )

Ø  aml_sdc_burn.ini

Ø  signed_aml_upgrade_package.img


Skyworth 43STD4000 Sys Info after Update



The updated software for Skyworth 43STD4000 Coolita Smart TV comes with Software Version: Ver C.2.1.4.4_921D_SA,Git e09618, Nov 30 2023 09:55:00.

Software Download Information and Link:

You can download the updated software for Skyworth 43STD4000 Coolita Smart TV here >>> Skyworth 43STD4000 Coolita Smart TV Software and Firmware

How to Update and Upgrade the Skyworth 43STD4000 Firmware and Software?

  • Download the Software and Firmware with filename "Security.7z" from the link above
  • Extract the downloaded file .7z file with filename "Security.7z" using WinRAR.
  • Format your USB Flash Drive to "FAT32".
  • Open the folder "Security" and copy "aml_sdc_burn.ini" and "signed_aml_upgrade_package.img" into your USB Flash drive root directory. Please refer to the image below for your reference.

  • Insert the USB Flash drive containing the  Skyworth 43STD4000 Coolita Smart TV Software and Firmware into your TV USB port located at the back, adjacent to the Antenna port.
  • Press and hold the power button of the your Skyworth 43STD4000 Coolita Smart TV while inserting the plug to the power supply. Keep pressing the power button until the Skyworth Logo appears.
  • When the "upgrading software appears" please do not turn off the Coolita TV. Please refer to the image below for your reference.

The whole software and firmware, update and upgrade process will took for a few minutes. Skyworth 43STD4000 Coolita Smart TV will automatically turn off and turn when the progress bar reach 💯%.

How to Download Skyworth 43STD4000 Coolita Smart TV Software and Firmware?

  • Click the link provided above: "Software Download Information and Link:"
  • Finally the Download Started. Please refer to the image below for your reference.

Once the download is completed, downloaded filename should be "高安-Security.7z", it is a compressed file. To extract the .7z file you need to download WinRAR apps here: https://www.win-rar.com/start.html?&L=0

How to extract .7z file?

Select the 高安-Security.7z, right click and click on Extract All..., please refer to the image below for your reference.
Select a Destination and Extract Files. To extract click "Extract", please refer to the image below for your reference.
The total size of extracted .7z file is 736MB. Open the folder "高安-Security" >>> "高安-Security" and copy "aml_sdc_burn.ini" and "signed_aml_upgrade_package.img".

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