Yes, I have electronics experience. The internal ir sensor disconnects when i plug the external ir sensor into the rear mounted socket i have installed. The ir sensor turns out to be a standard 3 leg affair. It may seem extreme, but after adding the sw upgrades this box is so good that the only things that would make it perfect (for 'er indoors) was the remote operation. Also, turning off the lcd backlights stops the attention of the kids to start messing about with it!