Are you using a specific recovery tool like or STM32CubeProgrammer ?
Before diving into the error, let's briefly understand what BootROM is. BootROM, short for Boot Read-Only Memory, is a small memory region in a microcontroller or System-on-Chip (SoC) that contains a boot loader or a small program responsible for initializing the system and loading the operating system or firmware into memory. The BootROM is typically executed when the system powers on or resets. Are you using a specific recovery tool like
: You restart the island (power on the STB), but the computer keeps shouting, "Please check STB UART receive full" short for Boot Read-Only Memory