naif, in that case you may restore receiver by reinstall software via COM port. On board receiver has a jack, which is used to connect to the COM port. Names of pins are written on photo for use with rs232-USB cable (not for hardware COM port in a computer). It's true for model receiver 508, and I think same for model 525 (I don't trye in practic). For example, work with cable - Gembird/Cablexpert UAS-DB9M-02.
For software upload in the receiver are used the programm (attached in archive) - WinSTBUpgrader.exe in folder /bin.
In programm input the next parameters:
SERIAL PORT - select the number COM port and click open.
Platform - select SYMPHONY-UPG-DDR2.
In window Upgrade - select Erase All, NORMAL mode, then select bin file with software, click the button Start and plug the receiver (power on).
Извините, вам запрещён просмотр содержимого спойлеров.