Hello Martin, Many thanks for coming back to me. I also have a Humax Foxsat HDR and the original problem was either remote could control the unit and visa versa. I solved this by changing the code on the Foxsat.
I completely switched off the HDR-1800T overnight and although I can power the unit on and change channels using the front panel, the remote does nothing. New batteries did nothing. Can only think that the HDR-1800T
remote has given up the ghost or I have a problem with the HDMI lead.
I appear to be going round in circles with this one.