Sites like SatDL or specialized satellite forums often host older "dump" versions (like V2.72) specifically for hardware recovery.
The operating system that runs the receiver's features like IPTV and Wi-Fi support. Download Dump 1515HD PRIME zip
If the receiver won't turn on (boot loop), you may need an RS232 cable and "loader" software on a PC to force-flash the dump file. Where to find it Sites like SatDL or specialized satellite forums often
The initial code that tells the hardware how to start up. Download Dump 1515HD PRIME zip