Bad 1 GHz cable. If water has gotten into the cable, the lower frequency will pass OK, but the high frequency will be severely attenuated. Cable run is too long. Swap C and Ku-Band 1 GHz cable to verify condition of cable. No audio Volume muted on either the TV or the satellite receiver.
Volume is turned down on either the TV or the satellite receiver.
CPU lock up, unplug receiver from AC and plug it back in. Most likely a bad MTS board. Might try reseating the board in case of a bad connection. Back to top SCPC receiver hooked to the M100C through the I.F. loop has an audio buzz This has been researched by our team of engineers and they have decided that it cannot be changed. Only gets one polarity Wire is disconnected.