Open the loader tool. Select the correct COM Port (usually found in your PC’s Device Manager) and set the Baud Rate (typically 115200).
It can revive "dead" receivers that only show a red light on the front panel. sunplus loader tool link
The progress bar will indicate the transfer. Once it reaches 100%, wait for the "Upgrade Success" message before disconnecting the cable or restarting the box. Troubleshooting Common Issues Open the loader tool
The tool uses the RS232 serial communication protocol to "handshake" with the box before the main operating system boots up. The progress bar will indicate the transfer
This can happen if the receiver is powered on too early or too late. Try clicking "Start" first, then plugging in the receiver's power.
Click "Start" on the loader tool and then immediately turn on the power switch of the satellite receiver.
Newer versions of the loader often allow you to select specific DDR types (DDR2 or DDR3) to match the hardware of your specific receiver. How to Use the Sunplus Loader Tool