It's either an image (software) problem, a hardware problem, or a signal issue. The fact that only two of the three units have a problem tends to eliminate the chance it is a signal issue, however note that DirecTV has changed the guide format recently.
That would lead to it either being a hardware problem or a configuration issue. Have you tried cloning the drive in the working unit and installing it in a non-working unit, then running a C&DE? How long have you let a unit sit at 100%?
There's a difference between needing help, and just being plain ole' lazy.
"You cannot teach a man anything. You can only help him find it for himself." Galileo Galilei (1564-1642)
HR20-700 with 2 TB, HR22-100, HR22-100, HR22-100, HR23-100 all running 0x5cd and networked.