Advent vega tablet

[Guest pippydo]

Hi everyone, I have just bought a Advent Vega tablet from Currys, all seams good apart from when playing a movie from my tablet to the tv the image on the tv only covers around a third of the screen tried adjusting tv ,no good.

When playing from you tube the image is full screen on the tv. I am using a usb stick for the movie and a HDMI lead to the tv.

Also my Buffalo External harddrive (500gb) will not play but my son's Buffalo hdd (350gb) will. Any ideas or info would be greatly appreciated.