Sony KDL46S4100 when turned on there is no picture just a blue screen

Sony eSupport KP 57WS500 Support This may help

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Screen-shots to defective LCD panels are given. You can see and compare to that to your TVs', and can make sure about the fault to an extent.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

check brightness to increase full

You have two problems: blue lines is convergence problem and the blue screen and shutdown is Blue Screen control is up too high.

Why pay lepricon when you can download for free from SONY!
http://esupport.sony.com/US/perl/model-documents.pl?mdl=KDL46S4100

Blue picture tube in TV is bad and requires replacement by qualified TV tech.

I think its time for sony to face a claas action, they do not supply parts in less than 7 years, and the unit should not have been sold so $high, they should buy them back, that is the best solution

blue crt shorting use crt restorer to lift short or replace picture tube /crt

does it have blue video image?