I am controlling an NEC TV with RS232 connection, but no matter what command I send, it keeps replying: \x00 1 NG 2x \x0D \x0A

I'm gussing this some sort of error message, does anyone know what this means and what I should do about it?

I noticed that PC Control is grayed out in the TV menus, I wonder if this has anything to do with it?

Cheers