If you wish to get some details; check the site linked here.
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http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
NB: Please read and understand well, the instructions to enter the service mode, before you begin. Be very careful.
Note how to "EXIT" the service mode; after entering and adjusting data. This is very important.
Type in the
brand name to 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.