Because you have an board, standard recovery (RS232 pin shorting) will not work to fix a corrupted bootloader. However, if the flash fails but the bootloader survives, you have options.
The user interface (UI) remains largely unchanged—a standard blue or black graphical menu common to 1506T chipset boards—but the under-the-hood improvements are significant: Dvbs-1506t-v1.0-otp-0 New Software 2023
identifies it as a performance-focused firmware update for satellite receivers using the Sunplus 1506T chipset. This specific "OTP-0" (One-Time Programmable) variant is often used in generic or "unbranded" receivers, and the 2023 update is primarily aimed at restoring broken internet-based services and satellite decryption keys. Key Features & Enhancements IPTV Stability Because you have an board, standard recovery (RS232
Update Your Receiver: DVBS-1506T-V1.0-OTP-0 New Software Guide If you are using a digital satellite receiver with the DVBS-1506T-V1.0-OTP-0 USB Drive : Use a freshly formatted FAT32 USB flash drive
: Confirm your board version is exactly V1.0-OTP-0 . Installing software for a different board version (e.g., 1506G) can "brick" your device. USB Drive : Use a freshly formatted FAT32 USB flash drive.
Back up your current channel list to USB before upgrading, as updates often factory reset the device.