My VIP622 has a dead HD. Error 311. I can still watch live TV. I'd like to not fool with repairing it, and just throw on an external USB. That will give me much quicker reapair time, and a larger HD than if I got it repaired. Can I plug in a New External HD, call Dish, and have it work, or is there a chance it won't work b/c my HD is already dead?