Directv in the RV does not work unless we are at home.

You'll have issues like this unless your RV dish is a Winegard Trav'ler or DirecTV SlimLine HD dish. 

Hi, HoopRV. We're sorry if you can't watch TV when you're camping. I'll send you a DM to get this fixed. You may also visit: https://www.directv.com/support/article/000086845 for helpful tips. Alice, DIRECTV Community Specialist

It’s been working for the last year no problem even we go out of state, but having this issue the last two trips.  DIRECTV said they’ve sent us a new box but don’t understand why the old box doesn’t work except for when we’re home

Thanks for the information, @Juniper. 
@HoopRV, we've sent you a DM. Please check your inbox to investigate further. Alice, DIRECTV Community Specialist

It’s just weird that when we travel it doesn’t work and when we get home it works just fine.  After being on the phones with DIRECTV when it wasn’t working, they are sending us out a new receiver. We haven’t received it yet.  so I guess we’ll see when we travel in a few weeks if it works away from home

We're sorry for any inconvenience. Please let us know if it works. Alice, DIRECTV Community Specialist

The receiver is an H 24-200, the dish is an oval HD dish.

The first time it was working for two days and on the third day, it just stopped working.  it would say to check all the cables that something wasn’t connected or when we reset everything we will get the 711 code then it would go back to telling us to check all the cables

Thank you for the information, HoopRV. The error 711 means your service isn't activated. We want to take a closer look into this. Let's meet in DM, so we can check your account. Alice, DIRECTV Community Specialist