My NEC 3090 is going on a year in age, and I still think it's a wonderful display. However, the last few times I calibrated it, when I tilted the screen up so that the colorimeter lay flat, the monitor swung back to the vertical angle.
Is there any way I can tighten the pivot to correct this? I don't see any easy access to screws or other means of tightening the pivot.
I have a 2690 and 1 1/2 years old or so and the monitor won't stay up after raising it up. Mine looks like you might be able to adjust the tilt tightness. Good Luck !