your firmware is up to date but iptv not. while watching live tv press menu, settings, check for updates and see if it downloads version.794. if not then send a pm to allaboutbuzz with your box, Mac and serial number and ask him to send you update.
since its not doing anything I would say try to factory reset with tooth pick and insert into audio video hole and keep holding while powering up your box and see if anything comes up on screen. if still not then I would contact buzz team and let them take care from there.