Switching inputs may be difficult due to the lack of discrete IR codes AND the inability to establish a base input (pressing ChUp or ChDn does not invoke the tuner). Further complicating the matter is the omission of input lableling AND Samsung's decision to skip "non-connected" inputs for Component, S-video, and Antenna and skip "non-active" inputs for DVI and VGA. Thus, the connection of any additional analog cable(s) or having a DVI or VGA source in an unexpected power state will disrupt macro operation.
I have a PB 507 on order, but it doesn't win the ease of use award. One option is to include a "FixTV" button for each source that can be pressed repeated until a picture is displayed. The final inconvenience is that the 507 users have reported that the TV defaults to Wide on every input change or power up. Thus, we get to push the format button repeatedly as well (this item can likely be automated in a macro - although power on time my be too long).
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