does anyone know how to remove the border from the TextInput component ?

After you are sure that the text input component is fully instantiated, you can
use:

mytextinputinstancename.border_mc._visible = 0;

You may be able to execute that script immediately or you may need to put in a
slight delay (e.g. run it in a setInterval function). It just depends on how
slowly it loads from the library.

thanks worked great