It isn't that easy. Components are soldered to the logic board. If you do not have the tools and experience you can quickly destroy a logic board trying to replace a component.
Check out the tags at right to see what you're in for in diagnosing and repairing liquid damage to a display. If an external monitor works you know your GPU card is ok... if it doesn't you need a new logic board.
If the GPU is ok there is a fuse/controller for the LED screens that could be your problem. You'll have to open the box and look with a mark one eyeball and magnifier for burned, corroded or swollen parts.
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