Booted-up my P.C. today and the display is ever-so slightly wobbling. I’m beginning to feel alittle sea-sick. Video card?
Could be monitor
Or other items on the same curcuit as the monitor
Any fans near the monitor? Anything with a motor? Anything running on power that isn’t normally there, or that has moving parts?
Assuming it’s a CRT monitor, try hitting the degauss button.