Does the ON button work the TV properly on its own when not in a macro?

I would try putting the TV ON command first in the macro followed by a .2 second delay. See if that works.

Try to find the discrete On and Off codes and see if those work.

There is also the possibility that the Neo is not sending out a long enough codestring. To solve that problem you will need to download and use NeoHacker. There is a way to alter the transmission length for an individual code and many people have had luck with this. I've never had to do it but a search here should provide the details.