We have one receiver in bed room thats fine but the front room receiver cannot find a signal. boxes are identical..on a 3 lnb 18x20 dish. this box has been slowly showing searching for signal more frequently . reset usually fixed it. diagnostics says box is good...setings are same on both. have tried unpluging numerous times . can't readily see any problem with cables...all conections are tight.i think we only use two of the 3 lnb's.we do not have a multi switch. any help is appreciated...thank you for your time...dh

Televison & Video - Directv - D11 DTV Receiver