I have an HR24 with an error 775 but they won't send me any kind of box. Must send a tech out even though the box gives me the error 775 in 3 different rooms while two other receivers work in those same 3 rooms so it is definitely the HR24 that is bad but you can't talk logic to those morons. And they assured me he will replace the HR24 with another HR24 if that is what is bad. I know he won't have another HR24 with him. Good luck to you though.