Just snow on my Direct TV connection?

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Are you saying the remote doesn't have number buttons?
 
The correct model number is F20345HN.
Have you found a manual ?
Need to see what inputs are on the back and how the TV goes to different Inputs.
I'm thinking like you, that the TV has an Input at the top or bottom of the channels with how old this set it.
 
I told him how to change the input by entering 91, but he isn't listening.
 
He said he could only access those channels doing it manually on the TV set.
 
I'd guess it's a 20" set based on the model number.
 
The DirectTV remote has buttons,as does the RCA remote,but neither does anything but increase or decrease the volume
So your RCA remote doesn't change the channel on the TV ?

Must be a setting in the menus that is blocking it from changing.
 
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Upgrading from SD DVR to HD DVR