I have a 2 week old Sony Bravia KDL-40V4000 It will not turn on

Try using a different wall plug one you know that works run an extension cord if you have to check it. Lastly are your wall plugs grounded 3 prong plugs? The old fashion plugs with 2 prongs are not sufficiently grounded and that may be your problem and you would need an electrician for that. Otherwise you may have a defective tv. BTW how did you change the fuse in the plug? Are you talking about the breaker box?If so you probably do have a grounding problem.