MacBook HELP!!

So do you have a MacBook, MacBook Pro or Mac Pro? Those are three different computer models?
I guess it is one of the first too, due to the mentioning of a screen, but using words like "I bought a new CPU 7months ago" makes me doubt that, as the MB and MBP don't have replaceable CPUs).
Anyway, eBay or Craigslist is your best bet to get rid of that computer, selling it as defect due to broken screen. What you can get for it: Mac2Sell, Gazelle or eBay (Việt Nam, Türkiye, Česká republika, Hanguk) might be good price checkers.
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"How to maximise your MacRumors troubleshooting experience" created by mad jew in 2006​

 

Logic board then, I guess.
Better sell it then, but you could mention the new logic board.