my manhattan RC-1978 has worked well  for the last few years. However for the last month or so some channels are becoming weaker or lost altogether . the stations still show on lyngsat as being active . did a reset and a rescan that made things worse . some channels that were weak before rescan disappeared entirely after scan . Is it possible  the LNB is going bad? It's one of those C/KU combos from china that mount in the center of the dish. Is there any way to test  other than buying a new unit  . Would a seperate Cband and a off set KU lnb be a better arrangement. I have a10 foot mesh dish . it has been checked for warp . Don't know where to go from here. 
		
		
	
	
		 
	
				
			 
	 
	 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		