Review on Certified Ergonomic 21.5 Inch Computer with 1920X1080P Resolution, 75Hz Refresh Rate, Blue Light Filter, Tilt Adjustment, Anti-Glare, and ‎453D9AA#ABA Model Number by Daniel Gonzales

I bought 3 of these in 2 months and 2 had power issues right away. The monitor turned itself off completely at the slightest vibration. At first I thought it was the cables (which I replaced). It's a sporadic problem, sometimes it seems like it's happening for no reason, other times it's just because you're leaning against your desk or working with your mouse. Revain replaced the first, HP is in the process of replacing the second. I think a production error? UPDATE: HP WARRANTY SERVICE IS TERRIBLE! They promised a quick replacement, sent me the box straight away for expedited shipping, got the bad monitor within 3 days and now 2 weeks later they reckon another 10 days before they can send out a replacement.