There are probably a lot of right (and wrong!) ways to explain this, but the television is designed to default to an 'always on' connection. Starting with the 2009 models, there are two "always on" inputs. One is the tuner, the other is the PC port. Based on those choices, the most obvious common default for most people would be the tuner.
Some regions have a HD tuner, which is not dead, but that can vary by geographical location, and I'm not sure if that's available in your area or if a changeover (recent or past or future) affects that.
There's not an ability that I'm aware of to either disable any ports or change the default port as anything except the tuner.
On that note, Samsung products with Anynet+ should change directly to the input when a Blu-Ray or HT system is powered on, which would avoid having to scroll through inputs. I realize that not all peripherals have or are compatible with Anynet+, but that's the way the units were designed.
I have a Samsung LE32B651T3W (32" LCD TV). I've connected a SKY+ box, XBOX 360 games system and a Samsung HT-Z320 surround sound to it. All work fine. (slight lag on the DVD player lip sync when 100Mhz is switched on but I've heard that's just a performance problem with the Z230 series).
My problem is: When I switch the TV on it always reverts to (the old) analogue/antenna signal with the (GREY fuzz) no signal screen on channel 0. This is really quite frustrating as I've got to grab the TV remote, click "source" and change it to my SCART input for the SKY box or HDMI input for the XBOX or surround sound. Why can't the TV just "sense" what connections have a live signal? - all my old equipment does.
Also, why can't I disable INPUTS so the source list isn't so long as it takes several clicks down the page to get to my XBOX connection on HDMI 1.
Can you disable the TV from trying to use the Analogue TV signal?
I would really appreciate a reply to this post as I'm not unhappy with the products from Samsung I just feel I've probably just missed something simple in the configuration.