The 55lk520 has 3 HDMI, 2 AV, 1 RGB and RGB audio and headphone inputs plus a set of component inputs. I've used nearly all of them. A wireless dongle for watching NetFlix on TV, RGB connections for projecting emails, Facebook, Twitter on the big screen, 2 Xboxes, 2 Playstations, and a dual deck DVD-VHS. All function flawlessly. The DVD-VHS is old technology so picture quality is not as good as it could be with a blu-ray player but that's not the 520's fault. The picture quality for network TV, games, and movies is excellent. This is a true gamer's TV. High resolution and no motion problems make for great gaming. I've had this TV for about 4 months and run it hard and long with no problems(up to 36 hours straight playing games with 6 pots of coffee to stay awake day after day). The astonishing feature is the vast number of options for for tweeking the picture quality until it's just right. In addition 4 separate picture mode that can be programmed to individual tastes(off,sports,cinema,and games). Top-of-line TV at an affordable price.