Does the 4000 handset have anything that lights up when transmitting? The previous handsets have four buttons to select PVR, TV, DVD etc, and the relevant button lights showing which is currently selected. If the handset is only transmitting intermittently I would expect to be able to see that by the indicator.
Hello, as an update I have once again reset the different codes into the remotes.
Re the advert skipping or jumping I can now see it is not enough to just press OK & >, you also need to make sure the time box above the blue line is also highlighted, then it jumps OK.
Many thanks for your help.