Clearly your action damaged the logic board in some way. I don’t think swapping the cables is the issue, instead I would check the displays data cable as it could damage the logic board if installed backwards and/or damage the socket getting pulled when pulling on the cables in trying to disconnect or even reconnecting the cables. If you had reversed the display cable often times this cap gets damaged
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Let’s get a better image of your logic board of the displays LVDS connector to see how it looks, take some nice tight, clear and focused pics looking straight on slightly down and from the side, posting them here for us to see