When the file transfer completes, click a second time to initialize the EEPROM burning process.
The software sees the port but cannot pass data through it.
The STB Upgrade Tool Ver 4.0.2 is a specialized Windows desktop application designed to communicate directly with a set-top box's internal flash memory. Unlike standard Over-The-Air (OTA) updates that run through the box's user interface, this tool works at a hardware communication level. It is primarily used by technicians and advanced users to: Fix issues (stuck on the logo screen). Recover dead or bricked set-top boxes. Upgrade or downgrade firmware using computer files.
: Select the exact virtual port matched in Device Manager (e.g., COM11 ). stb upgrade tool ver 40 2 work
Inside the STB Upgrade Tool, click the button. The software will transition into an active listening state, waiting for an acknowledgement signature from the chip.
Here is the trick that actually makes v40.2 work:
: Once the progress bar reaches 100%, click Finished and reboot the STB. Where to Find Files When the file transfer completes, click a second
The software cannot find the STB during its initial boot sequence.
Follow these steps carefully. Selecting the wrong settings can permanently damage your device's motherboard. Step 1: Prep the PC and Identify the COM Port Plug your USB-to-Serial adapter into your computer. Right-click the Windows Start menu and open . Expand the Ports (COM & LPT) section.
: Since most modern computers lack a native serial port, a USB-to-RS232 (Serial) adapter (often using the CH340 chipset) is typically required. Unlike standard Over-The-Air (OTA) updates that run through
The tool facilitates the transfer of software from a computer to an STB or between two STBs to fix bugs, add features, or restore a bricked device. Software Deployment : Installs firmware files onto the STB. Data Backup
[PC/Laptop] ---> (USB Port) ---> [USB-to-RS232 Adapter] ---> (RS232 Port) ---> [Set-Top Box] 1. Configure the Physical Connection
Navigate to your local directories and select the valid *.sgn or *.bin file. Decide on the option: