To modern TV, there will not be any preset reistor adjustments on board, as in older TVs. You have to enter its service mode option, using its remote control, select and adjust data value there to make picture aspect correct.
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/
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 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.
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