Some cabinets have wood cleats on inside that if you back off the screws the face will come off, others are screwed thru adjoining cabinets.
If your installing a LCD TV they come shallow and you could mount in that space between your wardrobe cabinets. I replaced a 13" TV with a 20' LCD within that same space leaving the doors on the two cabinets either side of the old TV. Check out my install over in Newmar forum may give you some idea.