Well that was easy, all I needed was the LG sticker info, and with that you have the LM270WQ1-SDE3 setup. So just get a conversion kit for that. You will or will not need a new PSU because to be frank I have no clue what power your SDE3 requires. But this Kit requires a 12V 4A psu. The seller will, should have a link to the proper PSU as well if yours doesn't work. Again these kits are super simple dumbed down boards, so the GPU will do all the driving of the panel. READ the below listing very carefully please. I found this listing simply by typing "LM270WQ1-SDE3 controller driver kit" and I can not vouch for the seller, although they have good seller ratings, I would trust them myself at 99.5%.
Oh and these kits probably will not be drop in kits, in other words you may need double sided tape just to get them to fit, or like me may need to have the button PCB just hanging out on your desk, lol. But hey you get your working IPS 1440p monitor back for a much better cost over a new unit.
After reassembling the monitor I got scared to death. I did a quick test and got input, then proceeded to fully close it. When I plugged, I was having the same warmup issue, but it took almost an hour to get it back. I really thought I had damaged something in the process
I'll get the kit on the link you showed. About the PSU i'll have to get a new one. The one that came with the monitor has that strange 4 pin setup, it's 24v 5a currently, so I'll just get a standard 12v 5a for the new board. Hopefully I'll be able to fit the PCB inside my case (maybe I can cut the bezel a little bit if needed to accommodate the PCB inside.
Thanks a lot for the help!