I DON'T WANT MY TV GOING INTO POWER SAVER MODE

I have purposely set my power saver preference to OFF so that my TV stays on all night while I'm sleeping. It worked perfectly until I recently relocated and had to order wireless WiFi set tops. The TV still stops working and goes into sleep mode. This wakes me up during the night. We also leave a TV on for our pets while we're away (and, so house looks like we're home). The same thing is happening...we get home and the master bedroom TV is in sleep mode, I can no longer go backwards if I'm 10 minutes late at the start of a show and it's extremely frustrating. While searching, I saw a similar post from 2 years ago! That sort of floored me, because, like I mentioned earlier-ours worked for years prior to moving into a different city in mid October. If a staff member is reading this-please reread it. I know what it does, and, I don't want it doing it. My settings are correct -the set top boxes aren't working. To be honest, we started cleaning the DVR out and stopped recording new shows. We can stream 90% of what we watch somewhere else. Maybe it's time to move on.