Hi there. When it comes to computer and the like, I am not the sharpest knife in box. My question. I saw an answer earlier about connecting tablet to tv, but my LG, has 3 HDMI boxes input screen but I cannot get a signal;is it to do with the Hudl tablet, the TV, or am I not doing something right? I would be very grateful if you talented guys/gals out there could help a very dull 67 yr old, so I can play games on TV. Thank you in aticipation.