Let's explore some common misconceptions about installation and setup, and discuss why it is a good idea to consult a professional for installation and setup services.
You may think, "There's nothing to hanging a flat-panel TV — I can easily do it myself."
Well, if you have experience with a home remodeling project or something similar, mounting a flat-panel TV to a wall won't be that difficult. Remember, though, there are many things inside your walls that you don't want to accidentally tap into – water lines, sewer vent pipes, electrical lines, phone lines, etc. So you may want to leave installation to the pros, as hitting one of these can easily cost you double to triple the cost of a professional installation.
You may think, "New TVs have already been optimized for the best possible picture."
However, some manufacturers set many of their TVs much brighter than you'll want in your home. They do this in case a TV is selected as a showroom model at retail stores, where TVs are often displayed under bright florescent lights. So it would be wise to check and adjust the settings of your new TV to match the lighting of the room it will be in. This can be optimized by getting your TV calibrated, and you can read more about that here.
You may think, "My existing network will work fine with my new HDTV."
Your setup may be fine, but if you're hoping to do things like stream movies, your network speed or type of router may not be adequate. You may want to consider a professional evaluation to help optimize your wired and wireless network setup as needed.