AW3423DW, randomly turns black

Same thing here... any news from Dell? My problem seemed to start when I received a replacement for one I had to rma. But I was also trying alot of other things to fix the previous one, like windows updates, driver updates and the like. I feel like the problem may be tied to hdr in some way. For instance, I played about 8 hrs of eve online (with windows 11 auto hdr) the other day and saw nothing, but switched to bf5 (with actual hdr support) and saw it happen twice in 30 minutes. The first time I noticed it was while playing cp2077 just as I exited a building. 

Hi, I recieved my AW3423DWF two days ago  and it seems to have the same problem. 

- RTX 2070 super

- Win 11 

- AW connected via DP

- another Monitor connected via HDMI

Kind Regards

Not able to edit my original response, but model is AW3423DW. Also, even after switching to manual input select on HDMI input, Monitor has started to go blank again about 2 to 3 times per minute.

I am having this issue as well:

• PC connected to monitor via DP (single screen, 3440x1440, 144hz, HDR enabled)
• MacBook Pro connected via HDMI (3440x1440, 60hz, no HDR AFAIK)
• I have tried this with only the DP PC connection, issue still occurs about twice per minute
• I have tried this with only the HDMI Mac connection, issue occurs about the same as above
• Switching from Menu- Input Source - Auto Select- On to OFF, then select HDMI when using it with the mac seems to have resolved the issue temporarily.
• I have not tried the above workaround with the PC connection yet.

Based on these findings, it seems like this may be a monitor firmware issue and not hardware. A firmware update might fix it.

The DW has no user upgradable firmware. I have the DWF version of this monitor without any issues. Can you try lowering the refresh rate? It might have something to do with DSC.

There are 2 versions of this monitor, DW and DWF. It's important to list which version you are experiencing this issue on.

So if you connect just the DP cable to the monitor and only use the DP connection, what happens?

The refresh rate is set to 60 hz at the moment on HDMI connection to the mac. I've had to now disconnect the monitor as the issue is so frequent, I am unable to work with it.

PC to monitor via display port connection (3440x1440, 144hz), no other connections. So far no issue, but is usually fine for first several (10 - 15) mins before the monitor begins going blank several times per minute. Will report back after a couple of hours.

UPDATE:

It appears to be the auto input select as others have reported

• With Menu- Input Source - Auto Select- OFF, both HDMI connection to mac and DP connection to pc work fine with no intermittent blank screen issue.
• My assumption is that when Menu- Input Source - Auto Select- is On, it is constantly listening for signal on all inputs. If more than one device is connected to the different inputs at once, they may be sending a signal to the monitor at the same time, confusing the auto input and causing the blank screen issue.

That would make sense. 

I'm having the same issue...followed all of the suggestions in previous posts.  I only have one input to the monitor via DP.  Disabling my second monitor as suggested lowered the frequency of the issue, but did not eliminate it.  For a while, I thought I was accidentally hitting the win-key, but I disabled that via Corsair iCue and it didn't help. Happens two to three times per match in Overwatch.  I don't notice any pattern or correlation to anything that's going on at the time. It is behaving as though you've hit alt-tab to go back to the desktop - or been pulled back to the desktop by a windows notification BUT the appearance of the "DP Input" notice from the monitor (and the time it takes to switch)  implies that it's related to something like a refresh rate change as previously noted here.  I matched the refresh rate for my desktop and I can switch with alt-tab instantly back and forth from Overwatch with no blanking and no "DP Input" notice, but the notice is always there when it blanks out in a game.  It's as though the monitor identifies a mismatch in refresh rate at points during the game and switches itself accordingly.  

Remove everything besides the single cable and the single monitor, and see if the issue persists or not.

The pixel refresh notice is definitely suspicious, but for me, the blanking happens every few minutes for the duration of my gameplay, which is usually two to three hours.