In the last day or so our Dish TV freeview box has stopped recognising its remote.  We have 2 remotes and the same problem is evident with both.  I've tried new batteries in each remote with no change and even tried my Harmony remote which has the functions programmed into it.  Have also tried unplugging the unit for a minute and then plugging it back in. Has anyone had this happen and is there a fix?  We don't really want to have to replace it again, this is our second Freeview box that's had issues after a couple of years of use.