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Just hangin'
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30,961 Posts
First thing is to swap the inputs to the TiVo and see if the problem switches to the Sat 1 input. If it does then you either have a problem with the cabling or the LNB. If it stays with Sat In 2 then it could be the receiver.

BTW, you can't lock in a transponder. All of them are used to bring in the channels. The receiver selects which TP has the channel. It does this by sending either 13v or 18v to select the odd or even TPS. So in your case, the 18v signal is getting reduced so it doesn't select the even TPS. Check for corrosion.
 

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Just hangin'
Joined
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30,961 Posts
I would still revisit all connections, inside and outside. There may be some corrosion in one or more of them. Also, remove the multiswitch from the equation by using F/F barrel connectors to connect both outputs of the dish to the DirecTV DVR. See if this clears up the problem. If not, then it is probably the LNB. If it does clear up, then the multiswitch is in question.
 
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