Main display randomly loses signal but never during stress tests ????

[Vizzion57]

Very randomly and occasionally (1-2x per day) my main display briefly (2-5 seconds) loses signal, goes dark with a couple of flickers and returns (monitor OSD comes on showing input and display mode) while my secondary display stays running fine and never loses signal.

It happens on any activity, whether it's watching YouTube, Twitch, or casually browsing but becomes much more frequent (1-2 times per hour) in some games (PUBG, Rocket League, unreal engine based games?).

The odd thing is, it never happens in other games (Call of Duty, Apex Legends, Doom Eternal). In fact, even when I run 3 x 20 minute stress tests (3DMark Speed Way, Steel Nomad, Port Royal, Time Spy Extreme, Fire Strike Ultra) back to back it never happens and I always get 99%+ consistency in frame rates. This is the only thing that is baffling me otherwise I would have ruled out the GPU and considered it a monitor issue.



System specs under my profile.

Parameters:
Main display: DisplayPort at 2560x1440 240Hz, G-SYNC and HDR on. 2nd display is running off HDMI at 1280x1024 at 75Hz.

My temperatures after stress tests:
Core average 64C, max 68C
Memory average 69C, max 77C
Hot spot average 79, max 84C
GPU core clock max 2910Mhz
vCore max 1.085v
GPU power draw max 312W

Troubleshooting steps that made no difference:
Tried a brand new DisplayPort 2.1 cable (monitor spec is DP 1.4, confirmed on OSD)
Tried different DP ports on both GPU and monitor (never tried HDMI)
Turned off/on G-SYNC on both monitor and on Nvidia control panel
Turned off/on HDR on both monitor and Windows 10 (Windows 10 HDR implementation is bad)
Turned on and off VRR control on monitor
Complete purge of display drivers and Nvidia files using both Nvidia clean-up utility and DDU, and reinstalled latest drivers (555.99) using Nvidia offline installer
Nvidia automatic tuning turned off and all parameters reset
Uninstalled GeForce experience


Any ideas? Can I confidently rule out the GPU?

 

[nomdeplume]

Try a different psu?

 

[Klemc]

Perhaps power settings, this tool accesses a lot hidden ones :

Windows power plan settings explorer utility

http://www.mediafire.com/file/wt37sbsejk7iepm/PowerSettingsExplorer.zip MD5 hash for zip-file: 4E5171D0F146BCD0AEF128256FC4B304 I got sick of...

forums.guru3d.com

 

[Vizzion57]

Try a different psu?

It crossed my mind but I thought both displays will show issues if it was a PSU problem.

But definitely going to try a new PSU when parts for my new system comes in and update this thread in case it might help anyone else. I'm aware a 750W PSU is close to the minimum recommended for the 4070 TI-S and a PSU with extra legroom might help.

Perhaps power settings, this tool accesses a lot hidden ones :

Windows power plan settings explorer utility

http://www.mediafire.com/file/wt37sbsejk7iepm/PowerSettingsExplorer.zip MD5 hash for zip-file: 4E5171D0F146BCD0AEF128256FC4B304 I got sick of...

forums.guru3d.com

Had no clue about this. I've been running Windows on the Ultimate power profile and was counting on that but I'll have a look at the hidden stuff, thank you!

 

[DeathtoGnomes]

Try different cables, make sure they are seated all the way

 

[JWNoctis]

For a simpler test, switch the cables for your displays around. See where the problem goes.

 

[micropage7]

what about changing the port?and try set it back to basic setting first

 

[alwayssts]

For me personally, this problem has often been attributed to the cables (and perhaps HDMI handshake).

Sometimes it's software jank, sometimes a hardware bug, but yeah...usually the cables.

When all else fails, power-cycle. If power cycle fails, check cables. Not trying to be condescending (as I'm sure you would have thought of this), but those truly are often the culprit.

 

[N/A]

My 27" is affected similarly. Only on 144 Hz. Strangely 60 Hz is fine. I think it's the power brick or the PSU is unstable. Now only happens once in the first minute after waking up.

 

[harm9963]

For my system , it came down to my TV firmware, TCL forum for my 646 , had to manually installed the firmware , no more go blank and come back .

 

[alwayssts]

You have a 646? Me too! I always upgrade the firmware via USB as soon as it's posted to telegram/XDVA and have never had a problem.

Sometimes I think it's actually gotten better given they used the same chipset/panel for years (after the 646) and the firmware from last years model still works with it. Who knows if they were holding back.

Never had that problem, though.

Man...I got that tv for what I feel was a literal steal and am extremely happy with it (considering what I paid [<$500 for a 65'']).

You liking it, beyond the...you know...That happening?

 

[harm9963]

You have a 646? Me too! I always upgrade the firmware via USB as soon as it's posted to telegram/XDVA and have never had a problem.

Sometimes I think it's actually gotten better given they used the same chipset/panel for years (after the 646) and the firmware from last years model still works with it. Who knows if they were holding back.

Never had that problem, though.

Man...I got that tv for what I feel was a literal steal and am extremely happy with it (considering what I paid [<$500 for a 65'']).

You liking it, beyond the...you know...That happening?

2.1 HDMI GPU is needed for HDR120 , have a 1080Ti as well 2.0 HDMI ,you would not have that problem , if you get a GPU 2.1 HDMI , V283 or v295 is a must have , v999 is a test version is out , been out a few week's , since I have no more issues ,will pass on v999 , Question what version, your 646 is on?

 

[alwayssts]

Let me look....

295. I didn't realize v999 was out. Now you got me warming up the USB stick.

That said, I don't game on it (besides my Switch, very rarely). I use my 65'' B9 OLED for that, which I'm also plenty happy with (until the next major 'budget' improvement comes along).

The 646 is the 'family room' tv...as I said in another thread it will probably get replaced with a 240hz 85'' with 4000p/1000fs HDR someday (assuming TCL stays on the trajectory I think they're on.)

The TCL just sees a whooollllleee lot of Youtube, Discovery, Amazon and Disney (on a Roku for simple Dolby Vision). Also, you know...the Roku K-pop channel...but we don't need to talk about that.

I probably haven't quite put it through the paces you have.

For $500 though, those Marvel movies in DV over Disney+ look pretty damn good IMHO.

 

[harm9963]

Let me look....

295. I didn't realize v999 was out. Now you got me warming up the USB stick.

That said, I don't game on it (besides my Switch, very rarely). I use my 65'' B9 OLED for that, which I'm also plenty happy with (until the next major 'budget' improvement comes along).

The 646 is the 'family room' tv...as I said in another thread it will probably get replaced with a 240hz 85'' with 4000p/1000fs HDR someday (assuming TCL stays on the trajectory I think they're on.)

The TCL just sees a whooollllleee lot of Youtube, Discovery, and Disney (on a Roku for simple Dolby Vision). I probably haven't quite put it through the paces you have.

For $500 though, those Marvel movies in DV over Disney+ look pretty damn good IMHO.

That's why I pass on the 635 , no Roku for me, Google Android works great for me , PC or TV , do prefer movies on the TV , Dolby Vision Rocks !

 

[alwayssts]

I passed on the 635 because 60hz iirc? I don't particularly care about using ATV or Roku, we're just used to using Roku. Also, you know...K-pop channel (and some dramas now too).

I also don't know if you know the history of the model, but ATV (being their first model with it iirc) was so effed up on it in the beginning they had to pull it from shelves initially.

It all got sorted eventually, but I think some of the initial reviews tarnished it for some, despite the underlying hardware being leagues above the competition. I think that's why I got it so cheap.

Dolby Vision is in-fact the shit. The fact this TV has it (and it's other higher-end features [on most brands] for such a low price) is pretty spectacular.

 

[kilo]

Can you provide the model of your second 1280x1024 monitor?

I suspect there's an issue with gsync on a non-gsync (or freesync2) monitor going on as you mentioned turning off gsync on both monitors.

 

[xtreemchaos]

i had a prob a while ago where my 2nd display kept on refreshing to cut a long story short cus i changed display cables many times it turned out it was the modded gpu power ex i plugged the psu in without and its never done it again.

 

[Vizzion57]

Try different cables, make sure they are seated all the way

For a simpler test, switch the cables for your displays around. See where the problem goes.

what about changing the port?and try set it back to basic setting first

I have already tried a different new DisplayPort cable on different ports but I haven't actually tried HDMI. I simply assumed if it's happening on DisplayPort with higher bandwidth capability it will happen on HDMI too but it could be a port issue so I am ordering another HDMI cable and will be trying that + switched around etc.

For me personally, this problem has often been attributed to the cables (and perhaps HDMI handshake).

Sometimes it's software jank, sometimes a hardware bug, but yeah...usually the cables.

When all else fails, power-cycle. If power cycle fails, check cables. Not trying to be condescending (as I'm sure you would have thought of this), but those truly are often the culprit.

Not condescending at all, I appreciate any suggestions, that's why I asked here in case anyone has any ideas I've missed and for anyone with similar experiences. Cables were one of the first things that came to mind and remains something I will continue to troubleshoot like I've mentioned above.

My 27" is affected similarly. Only on 144 Hz. Strangely 60 Hz is fine. I think it's the power brick or the PSU is unstable. Now only happens once in the first minute after waking up.

Sounds like a common issue, I'm adding power brick to the list of possible causes.

I haven't tested lower refresh rates or resolutions yet as it may mask the symptom but not find the problem since the monitor should be capable of running up to spec. However, for troubleshooting it might help so if all else fails I'll be trying lower refresh rates too.

Since you have the same mode monitorl, a firmware update was released at some point. If you haven't done so already might be worth having a look.

For my system , it came down to my TV firmware, TCL forum for my 646 , had to manually installed the firmware , no more go blank and come back .

You have a 646? Me too! I always upgrade the firmware via USB as soon as it's posted to telegram/XDVA and have never had a problem.

Sometimes I think it's actually gotten better given they used the same chipset/panel for years (after the 646) and the firmware from last years model still works with it. Who knows if they were holding back.

Never had that problem, though.

Man...I got that tv for what I feel was a literal steal and am extremely happy with it (considering what I paid [<$500 for a 65'']).

You liking it, beyond the...you know...That happening?

I forgot to add to the list of troubleshooting steps that my monitor did have a firmware update. Actually, now I'm realising it never happened before the firmware update. I wonder now if the firmware update triggered it. Thank you for the ideas, adding this to the list.

Can you provide the model of your second 1280x1024 monitor?

I suspect there's an issue with gsync on a non-gsync (or freesync2) monitor going on as you mentioned turning off gsync on both monitors.

It's an old 19" Dell P191 that's connection with a HDMI to DVA on the monitor end. I have heard of G-SYNC issues on multiple monitors with non VRR monitor attached so I tried with G-SYNC off entirely and the issue persisted. I will try seeing if the issue persists with the 2nd monitor disconnected. Thank you for the idea.

Meanwhile, I played an Unreal Engine game (Talos Principle 2) for 4 hours yesterday on ultra and highest resolution and unlimited fps + G-SYNC and HDR and to my surprise, no loss off signal. So I'm ruling out the game engine at this point. Weirdly, the monitor did very shortly lose signal following the gaming session while I was simply watching twitch.

Thank you for all the suggestions. I am going through a list of things methodically and your suggestions help to add things to try. But because it's so random and unpredictable without any specific steps to reliably reproduce it, it'll probably be a long process until I narrow it down.