I just purchased my Roku Express and when I start using it the video player would be at least 1/4 of the screen in the top left corner. Everything else would show fine except how the video was displayed and now all of a sudden my screen is blacked out. I can hear noises but no screen. I have two Roku TVs no problem but this Roku express thing is giving my problems and it’s only been three days. Tried a reboot any suggestions?