SONY appears to be having a major problem with the Smart TV apps not loading. Click the HOME button - click on the All Apps option - black screen. My problem started several days ago and now their website support forum has a bunch of new threads posted with the same issue. Some were told its KDL series tv's but it looks like its happening across the entire range. So far no solution found on any thread with multiple support contacts.
First I thought it was a buggy software/firmware update, but am now wondering if these sets are doing exactly what SONY told them to do - not connect to the internet apps.
I will be following up with escaleted support on Monday and will post any updates.