Consumer TVs may not work for you since some have what you wanted to avoid.
However you need to know there is a business branch for such models. So call them up and get talking about your needs. Here's a starter link.
I'm looking to display some ads on different advertising screens and on different locations. So I've been wondering the following:
.Do TVs include internal hard drives so I can store ads (videos+pictures) into them? I'd prefer to avoid external connections as much as possible(extrnal hard drive, USB keys...etc)
.Synchronize TV's hard drive with the cloud. Example: The TV will be connected to WIFI; Once a day, it will fetch automatically
ads from the cloud and synchronize them onto its internal hard drive. --> I would like to use this in order to avoid going to each location to change manually the ads
.Program TVs to automatically turn on/turn off at a certain time. Example: turn on at 8:00 am ; turn off at 10:00 pm
.Protect access to the TV programs: I would like to use them as display screens for my ads so I would like to avoid that an operator zaps
thanks a lot for your advises