Direct TV has made a lot of RV'ers pretty mad. If you leave your home
area over 250 miles you will not be able to get your local channels.
After going thru a lot of doubletalk you will be told you need to
re-register with a Mobil account!! Sounds simple...it's not. You
have to register your RV, personal info etc, this is done by SNAIL
MAIL...no e-mails, fax's. It takes 3-4 wks. then you are given
either EAST COAST or WEST COAST LOCAL depending on
were you live. It's a nightmare. Setting up a RV account doesn't
work anymore past the 250 miles from home. And to add to the
pain they charge you extra for the Mobil Account to receive what
you already pay for anyways. A lot of RV'ers are switching to
you now who!!
Some CSR's will turn the other eye, but some are strict policy followers.
When you have multiple homes.. For instance a residence, and a vacation home..
You are allowed to have receivers in both locations.
The rules beyond that become a little fuzzy. You cannot mirror receivers into separate locations. So either your "home" receivers must be active, or your cabin receviers must be active. Not both ways.
AGAIN, even if this was that way in the past, those are the actual rules, and some CSR's will acknowledge it, and some don't even realize it's a policy.
The best way would to be to deactivate your receivers at home, that way you are free to have services active @ cabin, without the hassle.
After that, whatever error/osd you're getting, would need to be troubleshooted accordingly.
An error code 775 means "Problem Communicating with dish". This is most likely caused by an SWM power inserter not being plugged in. It has nothing to do with multiple locations, account status, etc. So your basic problem is a problem with your system or the system set up.
As to having receivers at home, and at a cabin location, the terms of service only permit you to use DirecTV service at one location at any given time (under one account). But that is a policy, not technical, restriction. We'll assume for the moment that you are in fact only trying to use service at one location at any given time. If that isn't the case, then you do need to set up a second account for your cabin.
If you took a receiver from home and moved it to your cabin, make sure that both dishes are the same type and same technology (SWiM or legacy/multiswitch). You will have to go back through satellite setup on your receiver if the dishes are not the same. If they are the same, and are both SWM type dishes, then make sure you have a power inserter as part of your setup at your cabin, and that it is properly installed with the two coax connectors connected to the proper equipment (they are not the same).
I'd wager your 775 problem is due to your removing the Power Inserter from your home and taking it to the cabin. See link for pic of PI.
http://www.solidsignal.com/pview.asp?mc=02&p=PI-21&d=DIRECTV-PI21-21V-1.5A-Power-Inserter-for-SWimLine-dish-(PI21)&c=Multiswitch Power Supplies&sku=185463000894
You can disregard the post regarding losing local channels when traveling away from home. That is a technical limitation as all local channels are broadcast on a "spot beam" which restricts reception to the appropriate geographic area. And, even if it weren't, as previously posted it is illegal for Directv to provide local coverage outside the local stations licensed area.