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Many people have been using the Slimline with the standard 5LNB without 119 LOS which the guide data comes from when tuned to sat 103. They have found if they tune to the 101 sat overnight their guide data will stay current. This sounds like the same situation you are experiencing. There is a new, very new, 3LNB that stacks the data from 101 so data is received without using 110/119. There are several threads here with more information.