Dual screens randomly twitch to black for 2-5 seconds

[RickF]

I have dual screens. They each randomly twitch to black for 1-5 seconds.  Not at the same time

[MUC]

To make an assessment possible, please provide the make and model of your computer, the make and model of your monitors, and the manufacturer and type (USB-C/DisplayPort/HDMI) of cables you are using.

[RickF]

Dell Optiplex 7010
Processor 13th Gen Intel(R) Core(TM) i7-13700 2.10 GHz
Installed RAM 32.0 GB (31.7 GB usable)
System type 64-bit operating system, x64-based processor

Edition Windows 11 Pro
Version 23H2
Installed on ‎12/‎19/‎2023
OS build 22631.4460
Experience Windows Feature Experience Pack 1000.22700.1047.0

Monitors - 2xSamsung LF27T450F

Cables - DP to HDMI

[MUC]

Samsung F27T45
1920 x 1080 @ 75 Hz
2 x HDMI 1.4, 1 x DisplayPort 1.2

If your Dell PC has two DisplayPort outputs, I would recommend connecting the two monitors with a DisplayPort cable each to have a straight connection. And please then set up the monitors in the On Screen Display menu as follows:

[RickF]

I believe that's how I have it setup.  I have two DPs. Each monitor is connected with a DP to HDMI cable.  If that's not the same, can you break it down simpler for me? 

[MUC]

Please use cables that have a DisplayPort connector on both ends.

[RickF]

OK. I will try that. Thank you for the diagram.

[n_scott_pearson]

Have you verified that the firmware for the DP-to-HDMI cables is the latest? If it's not, I would be updating it as this would be the usual cause of HDMI connection loss issues (which is what you are seeing).

[Aside: I don't recommend purchasing DP-to-HDMI cables that do not have the ability to have their firmware updated.]

Hope this helps,

...S

[RickF]

I never heard of cables with firmware.  I have to assume mine do not.

[n_scott_pearson]

Every one of these cables has a processor that is performing the protocol conversion from DisplayPort to HDMI and most of these implement this protocol conversion using embedded firmware. It is a question of whether or not a particular cable has a method for updating this firmware and is making firmware upgrades available as issues are identified.

...S

[RickF]

Understood.  These are from a company called UNI.  From amazon. How would I know/confirm that the firmware could be updated?

[n_scott_pearson]

I went to their site (https://uniaccessories.com/) to check, but didn't see any support for firmware download/upgrade. You could try contacting their tech. support and see if they have any guidance for this.

...S