Chosen Solution
The logic board is what drives the LCD panel and is what is seen by your system 24" Alu LED Cinema Display Logic Board, Apple P/N 661-4823 Update (08/07/2020) Well you have me scratching my head here! Did you damage the displays LVDS cable and/or its connector on the logic board? To be clear the display was working and then it died and then you opened it up correct? So you didn’t damage it before hand. Here’s a bit more info:
As you can see the logic board is about it other than the display its self
