Just to close the loop on this - I received my replacement monitor a few days ago, and have used it for 15-20 hours with no sign of the black screen issue. I'm super happy with this outcome, because I absolutely love this monitor, and I didn't want to have to go with a different brand or model. I'm really sorry for the original poster in this thread, since he is already on his second monitor and still has the black screen issue. I would still encourage him and anyone else having this issue to reach out to [NAME] on twitter and ask them for help. I'm very impressed with Dell's customer service, and I hope they will take care of all of you as well as they took care of me. The more awareness they have around this issue, the more likely it is that they'll make it right for those of us unlucky enough to experience it. Good luck!
Hello, I bought the AW2721D 2 weeks ago. I noticed that the screen randomly looses the image, suddenly the screen goes black (but the screen power is ON). The backlight of the screen stays on. The complete sequence is  Image OK with backlight ON -> No image with backlight ON (you can see it because of IPS glow), and the OSD is not appearing using buttons on the monitor; When it's happening, the screen does not respond, it's impossible to use the buttons on the monitor to display the OSD to change input or display informations for example. The only way to get the image back is to turn off the screen, and turn it on again. I've been experiencing this on:- Windows 10 1440p (240hz) using a DisplayPort cable while gaming- MacOS BigSur 1440p (144hz) using HDMI cable while working The firmware on my screen says it's M0B101. Do I have a defective unit ? My friend who bought the same screen at the same time on the same reseller (amazon.fr) does not have this issue. I doubt that the power cord is the reason this is happening because the backlight stays on. Any loss of power would translate in no power at all (no backlight) for a short amount of time. This is not the case for me.
AW2721D, black screen, image lost while using it