Are there any visible signs that an LNB needs replacing? I am trying to setup a motorised receiver with USALS that I have purchased and I can't get a signal. If I check the lnb the flay side that faces the dish is bulging a little - I'm not sure if this suggests replacement is needed? I had signal briefly on one transponder at 19e, I nudged the dish left and right and then totally lost the signal. Another dish in the same location receives my skyq sevrice so unlikely to be building or trees in the way. Have also checked the f-connectors. Any ideas?