Mrak0020 Nope, I have never experienced anything like that with any other display whatsoever.
For the record, I used to own a couple of old Nokias, then Samsung Galaxy S and S II, Samsung Galaxy Note 4, and now I'm using Samsung Galaxy Note 10 Lite (has PWM in the low-brightness regime, but unproblematic for me).
Frankly speaking, I'm totally confused by what's happening. I can't even figure out if it's the display, the GPU, or some combination of hardware elements. Dell actually replaced the display for me once (for the same model, they claim it's the only one which fits, but I'm suspicious of that), but it didn't help in any way. What strikes me most is that I have exactly the same problem with two very different machines (and only with them; maybe I should try a few more recent models? :-) ). My working explanation is that either some new technology has been introduced in displays, or both setups are faulty, with an analog of coil-whine, but hitting eyes not ears.
Let me add that I consider my eyes normal.
ryans The BOE display in Precision 7760 I mentioned above is exactly the one that has been inserted (I took a photo during the on-site "repair"). With Lenovo I'm 99% sure it's the one; I'll do my best to find an app like HWinfo for Ubuntu, which is my working environment at the moment, and let you know (or I'll reinstall Win 10, but I need some time for it, since I'm having hard time at work :-) ).
EDIT: In case you're wondering where I took the Lenovo display model from - I know I have AUO there (Nvidia panel says so), and the only AUO compatible with my machine (checked by serial number) is B156HAN09.2