Well.
I have a Samsung 32 HD new TV and yesterday I run into a bizarre issue.
The sound was not there, not on channel or HDMI. I closed opened the TV, check diagnostics but nada.
Then I suddenly remembered that I have an IT education(God forbid), putted the cape and the mask and unplugged the TV for 30 seconds and plugged it in again.
Problem solved, finger raised.
Samsung TV's are only great for one and only thing. Their display. Brilliant colors but everything else is problematic.
Also another time I needed to put the IT suit was when I was opening the PC and the TV channels stopped reception. That was an HDMI issue, if the cable was plugged and the PC open it interfered with the TV channels.
So I have a 2 in 1 HDMI switch that I click and "kill" the active HDMI when I want to switch to TV and not close the PC. Again, problem solved, finger raised.