Connected Win 8 PC to TX-L42E6B TV using HDMI cable. BIOS screen shows then it goes black when the OS loads. Added a dumb monitor on VGA. That stays black during initial boot, but becomes the monitor as soon as Windows starts. Going into Screen resolution only shows one screen (the old monitor). But I can play videos from the PC on the TV using 'Play to', so it appears the HDMI cable is fine. Any thoughts on how I get around this? I would like to use the TV as the sole monitor for the PC.