Now that you mention it... I had an old, slow PC after i bought that Vizio and the Samsung died... and it wouldn't display or transmit sound correctly over HDMI. I was ready to pull my hair out..New fanless i5 PC with plenty of RAM - everything runs great no problem. So you gotta make sure your PC is fast enough for whatever reason...
Now that you mention it... I had an old, slow PC after i bought that Vizio and the Samsung died... and it wouldn't display or transmit sound correctly over HDMI. I was ready to pull my hair out..New fanless i5 PC with plenty of RAM - everything runs great no problem. So you gotta make sure your PC is fast enough for whatever reason...