The LNB is the white-capped thing that sits in front of the actual dish.
A dual-lnb dish will have two cables coming off of the LNB and a single LNB will have one cable coming off of the LNB.
It seems that inside the gray box will be a multi-switch that has coax wires coming from the LNB going in and four outputs going out. It seems that you already have a dual LNB dish.
In order to operate a DirecTivo properly, you will need two wires going into that room, other receivers require only one.
As far as the receiver goes, call Directv and order a new card for it and get it in your name. If there is an outstanding balance on the receiver, the CSR should be able to let you know. If there is, just go get a new system rather than deal with someone else's old balance on the receiver.
Hope that helps.
A dual-lnb dish will have two cables coming off of the LNB and a single LNB will have one cable coming off of the LNB.
It seems that inside the gray box will be a multi-switch that has coax wires coming from the LNB going in and four outputs going out. It seems that you already have a dual LNB dish.
In order to operate a DirecTivo properly, you will need two wires going into that room, other receivers require only one.
As far as the receiver goes, call Directv and order a new card for it and get it in your name. If there is an outstanding balance on the receiver, the CSR should be able to let you know. If there is, just go get a new system rather than deal with someone else's old balance on the receiver.
Hope that helps.