Computer screen randomly loses connection. Computer itself stays on.

Lukeman499

Prominent
Jul 3, 2017
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510
Sometimes after I turn on my computer, a few minuets later the screen will lose connection to the computer. Some of the time, the computer starts to lag insanely bad before this happens while other times it just loses connection. I checked the task manager while the lag is happening but it doesn't seem to be caused by any substantial load on the CPU, SSD, or Memory. I also play some pretty intensive games at times and it never seems to occur when i'm playing those, only a few minuets after turning on the computer.

This problem doesn't occur every time i turn on the Computer. It seems to work fine for like 3 days, then the screen will shut randomly off a bunch of times in a row a few minuets after turning it on (since i have to restart the computer every time it occurs). Some of the time the lag will occur and I will need to hard restart it, other times the screen will just shut off. The lag isn't always followed by the screen shutting off but i need to restart the computer anyway since it is unusable with the lag.

I've made sure all the cords are connected well, my drivers are up to date, and the computer is dusted out. Most of the parts were purchased the summer of 2015 for this custom build. If you have any insight as to what part or software might be causing the issue, please let me know. I can't tell if it is a motherboard problem, processor issue, graphics card problem, or monitor problem. Thank you for your time.

Computer parts:
Intel - Core i7-6700K 4.0GHz Quad-Core Processor
MSI - Z170A GAMING M5 ATX LGA1151 Motherboard
Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory
Crucial - MX200 500GB 2.5" Solid State Drive
EVGA - GeForce GTX 980 Ti 6GB Superclocked+ ACX 2.0+ Video Card
Dell - S2716DG 27.0" 2560x1440 144Hz Monitor
 
Solution
I'd have suggested cables first... but you did that.
You've dusted and likely check temps.

If you have another monitor you can swap in that will tell you if the monitor is going bad.

Using a tool like MSI Afterburner try UNDERCLOCKING the video card about 10% back to base clock of 1 ghz and maybe a bit off memory and running that way for a few days. If everything suddenly gets stable then your video card may be having trouble. (FWIW I ran one HD7850 with a 5% underclock for a couple of years before it finally died. It worked that way and failed without the underclock).
I'd have suggested cables first... but you did that.
You've dusted and likely check temps.

If you have another monitor you can swap in that will tell you if the monitor is going bad.

Using a tool like MSI Afterburner try UNDERCLOCKING the video card about 10% back to base clock of 1 ghz and maybe a bit off memory and running that way for a few days. If everything suddenly gets stable then your video card may be having trouble. (FWIW I ran one HD7850 with a 5% underclock for a couple of years before it finally died. It worked that way and failed without the underclock).
 
Solution