The set has to be built as a HD set to start with, there is no HD switchover.
Digital switchover refers to the stopping of analog television service and the initiation of digital television service.
A digital switchover is used to convert television signals that are designed for old tvs so that they will still function on advanced digital televisions.
Extensive research has shown that the digital TV switchover varies depending on what country one is inquiring about. According to Wikipedia the Netherlands were first to switchover to digital and that took place in 2005. The US switched in 2009 and Canada in 2011.
Digital switchover in my area, Try re-tuning your Digital TV or Freeview box.
the switchover
the switchover
Older televisions can make the switch to digital programming with a digital converter. The converters are usually about $20-$60 and are available at most electronics stores.
You need a converter box connected to your own antenna or subscribe to cable or a satellite service.
There is a digital tuner in the Samsung model. It is also possible for the TV to receive off air digital signals.
Vizio VA19L has a digital tuner in it.
That was a process put into place a few years ago to convert all analog televisions over to digital formats. This was done in affect to upgrade the current technology countrywide to deem analogs unusable.
The samsung V9800 unfortunately doesn't come with a digital tuner, but your TV may have one in it.