This morning one of my daughters dropped the remote (RM-F01 sticker ADB 1.0), and the battery came out. By the time I found it and replaced it, it seems to have lost the settings for the HUMAX box, it still works with TV and DVD.
I seem to have spoken too soon, I’m still having the problem. The remote worked for a couple of minutes and then the problem returned. Pressing 0+Ok is not doing anything now.
Can you try removing the batteries from the remote and holding a button down to discharge the stored energy. What happens when you re-install the batteries ?