Re: Roku LT malfunctioning when playing on demand programs
Roku has used LT on three different models: 2400, 2450 and the new 4662. Which model do you have? If it's one of the first two, those are extremely old and no longer supported by Roku. And from your description I think it might be one of those two.
If yours is a 2400/2450, it's really time for an upgrade. Those don't even support 1080.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.