I just moved into a home where the previous owners left a mount plate on the wall above the fire place. They took the rest of the mount kit with them when they moved out.

My question is, do I have to remove that mount plate and install a new one if I want to mount my TV on the wall in the same place? Or can I just buy a new mount kit and the parts will work with what they have left in place?

I guess my question is, are there standard sizes for the mount plates, or is everything different from each manufacturer?

Thanks,
mpethe