This is the T-con board (normally covered by a metal plate)

top of picture are the two ribbon connectors that goes to the LCD panel, the cables can be released by flipping up the black horizontal plastic cover

the bottom of the picture is the connector for the cable that goes to the main board, the cable can be release by squeezing the triggers on the sides of the cable

use extreme caution to avoid damaging the ribbon cables (if they get damaged, replacement parts could be bought on ebay or other online sites)

make sure you put all the plastic square pads (heat spreader?) back onto the new board on the appropriate chips