Always backup your current software and channel list ( dump ) before flashing new firmware.
To understand the software, one must first understand the hardware: Dvbs-1506t-v1.0-otp-0 New Software 2021
Solution: Check your LNB type (Universal 9750/10600). Manually enter a known working transponder (e.g., 11720 V 28800 on 28.2°E) and perform a single transponder scan. If found, your blind scan settings need adjusting – lower the “Step” value to 2 MHz. Always backup your current software and channel list