I test everything before it goes out. If you get a remote and it does not work, it could be for a number of reasons such as not the correct remote or an issue with the IR sensor on the unit (that's what picks up the signal from the remote).
Just the thing to get the old TV back to workable status
This item was exactly like my original one. After a few years the button contacts wear out, so you have to push them very hard and hold them a long time to get a result. A new one is like they ought to be: quick and sure..