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Those wood plugs are usually covering the screws that hold the face material to the cabinet. They can be pulled out most of the time with a soft cloth and pliers as you twist them gently. Then you can remove the existing t.v. and get the modifications ready for whatever you want to install. There are kits for mounting flat screens and allowing them to be moveable if that is something that would interest you. If you need more please attach a photo of the front of the t.v. to your post so I can see what you are working with. All follow ups are included in our fee.