2006 RL38 42" TV Removal

[KingRanch]

Greetings,
I looking to replace the Sony 42 Plasma, with a new 46" 3D TV which is the same size as the 42.
I have felt behind(can't see) the 42" and don't feel any release pins for the mounting bracket. In my blind search it feels like L bars and rod's that hold it to the wall. What is with that?

How do I remove the TV and do I need a new mounting bracket?
Is the Plasma mounted with a standard TV Mount?

Good Grief if not :cry:

Thanks in advance
John