Hi, it seems to be problem with power cable.
I,ve found slack plug on the rear pannel, changed it to the new one and now the pulse power supply works normally and the device doesn't hang up.
By the way, sometimes I receive "xxl" channel, sometimes not.
I thouhgt, that depends on signal level but now I can see stable 76 percent and still "scramble channel".
What is the keys m8 ?