Hi there, As it has become a real pain to use the onscreen keyboard of  Sony Bravia by using the TV  remote control, I bought a Logitech wireless (K400 Plus) keyboard so that I can hook it up with the TV. Unfortunately, the TV simply does not seem to recognise the keyboard! I can see a mouse pointer on the screen (which moves) but absolutely no response when the keys are typed!!! Has anyone got tips on how to get this working please? Many thanks in advance :)