If the joint is loose, frayed or corroded, you will need to replace the connector and screw it back into the jack. Slide down the cover of the coaxial cable connector’s joint with the LNB output jack, gently pull the cable to ensure that the joint is firm and secure. If the casing is warped or cracked, you will need to replace the LNB, because water ingress will have damaged the electronics inside the casing.Ĥ. Inspect the plastic casing that encloses the electronic components of the LNB.

The LNB is usually horn-shaped, cylindrical or rectangular.ģ.

Find the LNB unit on the end of the dish arm. Go to the location of the satellite dish with steps, a ladder or a raised platform. Satellite receivers send a low voltage charge up the coaxial cable to power the LNB, so always disconnect the power before checking an LNB.Ģ. Switch off the satellite TV receiver and disconnect it from the main power supply outlet. To troubleshoot an LNB, first you should visually check the device and then test the signal levels with a satellite signal meter.ġ. LNBs can degrade over time, particularly in locations exposed to extreme weather conditions signs of a faulty LNB include missing channels, video pixilation, signal drop-out during heavy rain or a complete loss of signal.

The Low Noise Block ( LNB) device on the end of a satellite dish receives the broadcast signal collected by the dish and transmits it to your satellite receiver through a run of coaxial cable. 4 Comments Tuesday, 1 April 2014 | Ashley

Bell satellite transponder list