Facing TV Problems? Ask a TV Technician.
Hello and sorry you're having problems.
You're going to need another device with which to receive Netflix on the TV, since Netflix only works with devices that have a dedicated Netflix button, or one that supports the Netflix apps from it's APP list.
The most cost effective method for your to get Netflix on this RCA TV is to purchase an Amazon Firestick, which connects to the HDMI port on the set, and then allows you to select the Netflix APP, the log in (or create an account on www.netflix.com) and you can then view Netflix content on the TV.
The FireStick is below and is a good option for a TV without the built in Netflix support:
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This set has no internet connectivity, and therefore is not a Smart TV. A Smart TV is required, along with a Netflix button on the remote to be able to receive Netflix broadcasts directly. That is why I suggested the Firestick above so that you could still enjoy Netflix programming on your set.