One of my hobbys is electronics repair. I have an old laptop that the screen died on me. So I've been trying to repair it, I ordered an identical replacement screen and installed it but it got no power. I swapped out the inverter board (it's the thing that drives the screen) and it turned on, but it triggered my migraines instantly. I figured it was just a bad screen for me and was going to toss it, when it started flickering and then lost power. I diagnosed the power issue to a faulty capacitor on the inverter board (it as showing wildly out of spec capacitance). So I swapped out the cap, and lo and behold, the screen now not only worked, but gave me ZERO eye issues!
I know it's not a very practical finding, but it does give us a new place to look: power supplies/power components. I'm going to see if I can get some stats on good screens and bad screens I have experienced and see if they have different power supply configurations, if I can get my hands on some spares I can pop them open and look for branded capacitors (if labeled), maybe there is a correlation there. It would certainly explain how identical display hardware across 2 different devices can triggers symptoms differently, and dirty power from bad capacitors can absolutely cause display issues . I just fixed the display on an old DVD player that was due to a faulty cap.