Solved M27Q X monitor sometimes flickers black for a couple seconds then back on

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tiucaner

tiucaner

PCHF Member
Jun 28, 2024
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This has been happening several times a day for several months now. I have a M27Q X monitor connected via DP to a RTX 4080 and another older monitor a HP22w connected with a HDMI cable. The issue only occurs 95% of the time with the main monitor with the remaining 5% happening with both at the same time. It just flickers black for 2 seconds and then back to normal. Tried reinstalling display drivers, new cables, rearranging cables, switching ports on the GPU, nothing seems to work.
 
Sorry but you have post on a tech forum asking for help but have provided very little information about your computer or it`s hardware, this makes it impossible for anyone to even hazard a guess as to what is going on.

Is the computer a custom build or brand name such as Dell or HP, if a brand name, provide the model name or series number (not serial) if a custom build post the brand and model name or number for the CPU, MB, the RAM ( including the amount, number of sticks and speed ) add on video card and the PSU (power supply unit) providing these details will enable folk to better help you.
 
Custom built:

OS: Windows 10 Pro
MB: ROG STRIX B660-F GAMING WIFI
CPU: i7-13700KF
GPU: RTX 4080
RAM: 32 Gb DDR5 (2x16 Gb Kingston)

PSU I have no idea and can't really check due to a disability. I do believe it was at least 1000W.
 
The PSU is a strong contender as the potential cause so we really could do with the info, any paperwork from when the parts were purchased or alternatively is there someone that you can ask to take the side off the case to get the info off the PSUs info sticker.

tiucaner said:
RAM: 32 Gb DDR5 (2x16 Gb Kingston)
Click to expand...

What is the speed of the RAM.

tiucaner said:
I do believe it was over 1000W.
Click to expand...

1000W sounds great but it means nothing if it is not one of the top brands and efficiency ratings.

Are you aware that having different specs of display causes issues as does using display adapters.
 
So the RAM is XMP Enabled and is 4800 MHz. I can't really check the PSU right now. Will try when I can.
 
Found out, it's an Asus ROG STRIX 1000W. I should add that the PC was cleaned about a month ago and even changed the case for better airflow and replaced the CPU cooler for an AIO. The problems already occurred before all of this.
 
PSU and the RAM speed are both okay.

phillpower2 said:
Are you aware that having different specs of display causes issues as does using display adapters.
Click to expand...

You missed answering the above and the answer is important as it will help us with the tests that we will suggest.
 
I'm not sure I understand what you're asking. My main display is 1440p at 240hz connect directly to the GPU with a DisplayPort cable. The other one is 1080p 60hz connected with an HDMI. I even separated both cables to the furthest ports on the GPU in case it was some sort of interference.
 
As was previously advised, using any form of adaptor and having different specification screens will 100% cause you issues and what I was asking was were you aware of this, see Will using two monitors with different resolutions result in scaling issues? info here
 
Now that we know that you are aware we can suggest the most obvious of tests for you to do (y)

Completely disconnect the second monitor and any adaptors and test by using the computer as you normally would, post back with an update when you are ready.

If the above goes okay we will then test your GPU and the one screen by having you run a couple of programs that we use.
 
Used my PC normally, completely disconnecting my secondary monitor, and the flicker to black still happened.
 
Can I ask which monitor was used and did you use the HDMI port, if the HDMI port was not used please repeat the test while connected to the HDMI port and then post back if you will.

Both screens having a HDMI port means that this will be the most conclusive test to do at this time.

If the HDMI was used in the first test, disconnect the first monitor and hook up the second monitor via HDMI ports and repeat your testing.
 
I used my main display with the Display Port and disconnected my secondary monitor that has the HDMI cable. So should I still disconnect my secondary monitor but use HDMI on my main one?
 
Never mind, I understood. Connected both monitors via HDMI. Of course by 240Hz monitor now only goes up to 144Hz but will now use it normally and see what happens.
 
Testing one monitor at a time using the HDMI port is a must.

Doing any testing with both monitors connected is a 100% complete waste of time as the two totally different spec monitors will definitely cause issues, the 60Hz monitor is way too slow to be paired with the 240Hz screen.
 
OK, got it. Disconnected my secondary monitor and now using my main monitor with HDMI.
 
phillpower2 said:
If the HDMI was used in the first test, disconnect the first monitor and hook up the second monitor via HDMI ports and repeat your testing.
Click to expand...

Have both screens HDMI ports been tested and both have the same flicker.
 
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