I have had my Chapparel C-band lnb for quite a number of years. (Don't hold its age against it). The lnb has worked fine for all these years, but now a possibility exists that it is going bad. What are the symptoms? What can I do to check the lnb and tell whether or not it is going bad or has failed? Let's assume for the moment that my receivers are working properly. No failing parts. (I have a DSR920 and a DSR922). I also have a SV360 Elite slaved to one of the DSRs. The symptoms of picture quality when the SV360 was hooked up to the DSR920 would be: The DSR920 is off while the SV360 is on. -- Picture cuts out -- No signal. The DSR920 is turned on momentarily, signal comes back on the SV360. The DSR920 is turned back off. Picture good for a variable amount of time. Then the picture cuts out -- no signal. Now, I change all the connections from the DSR920 to the DSR922. No loss of signal. One day later, all of a sudden, the SV360 picture cuts out. I turn on the DSR922 and the picture on the screen (we're talking g4-16--Preacher) is trying to come in, but won't. (I am using G4-16 as the polarity monitor for vertical. G4-17 as the horizontal polarity). The screen keeps flashing the picture, but cuts out). If the lnb is failing or has failed, what would be the recommended replacement lnb for c/ku for my 10 foot mesh dish. (I am wanting to change to c/ku anyway for more channels, especially sports). Thanks.