good info jenius jat but this will require some tools like multimeter , soldering gun etc, my old tonytone stb was not at all scanning any channels and i had checked the lnb output it was ranging from 19-21 volts fix, i came to know that some thing is wrong wit hthe stb and had to buy new one , melbon full hd, stb , ,but i have the old stb with me will have to give to some known person to repair it.