I wanted to consult with you on a matter. I recently bought my firth laptop. I don’t know exactly what my sensitivity is (i had a light condition of floaters that seemingly got worse, but the eye doctor confirmed that my eyes are ok).
Two laptops I had to return because I couldn’t handle the screen. now I’m having the same issue with the my current dell 3550. (all screens were wled, fhd, Anti-glare, -TN, IPS, PLS and AHVA). i always encounter the same problem. The screens seem hazy and too bright at all brightness levels, and on the current one I’ve also noticed that the screen also have a sparkly effect and it's possible that i can detect some blur on letters.
After some long research I could come up with the usual causes (aggressive anti-glare coating, blue light and pwm). Other things that I haven’t explored too much were vcom, screen refresh rate and pixel invertion.
The only clue I have is this: I previously had 2 models of latitude e5570. Same model, but different panel and one of them had a dGPU. One of the e5570 (AHVA) had a screen that worked great for me (I had to return it because it had coil whine). the other one (IPS) had an horrible screen.
Btw, the e5570 with the great AHVA panel was reviewed in laptomedia and it is stated to be PWM free.
So basically now i know that I can handle conventional led screen, but I don’t know exactly what’s the problem.
Now I’m stuck with a dell latitude 3550.
I thought I could try to replace the panel with the one that is installed in the e5570 (the panel is compatible), but I’m worried that it won’t be enough to eliminate the PWM or other software/bios/hardware differences that may have something to do with it. I also don’t know if PWM is controlled both by the panel and the laptop?
i’ve tested the dell 3550 for PWM with the PWM ufo test, and I could spot separate lines at all levels of brightness. when I tried this test with the dimming function on in IRIS software, I couldn’t spot separate lines.
What do you think, is it worth to replace the panel? Otherwise, it’s pretty hard to aim for a specific reviewed model that has a specific panel, because you don’t know upfront what panel you’ll get.