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Graphic Issue On Startup

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Hello friends - long time lurker first-time poster, dealing with a frustrating situation.

Two Weeks Ago:

I was using my desktop (to play WoW) and my girlfriend called and I spent ~15minutes on the phone with her. While we were on the phone I noticed the monitor go to sleep because I hadn't moved the mouse or used the keyboard. When I finished the call and went to move the mouse and use the keyboard I could not get the monitor to wake-up. This had happened occasionally in the past and was always fixed by restarting the computer. This time, however, no matter how many times I started and restarted the computer the monitor would never turn on - I kept getting a "No Signal - Monitor Going to Sleep" message.

First I tested the monitor - I plugged it into my roommates desktop and the monitor worked fine, ruling out the monitor and HDMI cable as the culprit (in my mind...). I figured there was some issue with the hardware in my computer sending the graphics signals to the monitor. I was able to boot with CPU graphics by removing the graphics card and plugging my monitor directly into the motherboard. I replaced the graphics card and I was back to being unable to see anything on the monitor.

At this point I figured it was the graphics card (GTX 1080 Ti...) and I was very upset because the card is just about two years old. I never play anything more graphics-intensive than Rust, and have never used the card for BitCoin mining or anything like that. I didn't experience any graphics tearing or any symptoms that would suggest the graphics card was dying. Either way, I figured it must be faulty and placed an order for a new MSI Gaming GeForce GTX 1660 Ti and figured I'd try and make a warranty claim on the 1080 Ti.

As soon as I replaced the graphics card and installed the new drivers my computer was working like new - no issues and back to normal.

This Weekend:

I was away for the long weekend (Friday-Monday) and when I got home Monday night my computer was on and running. This happens occasionally - I've never been able to diagnose how or why, but sometimes the computer starts by itself. I chalked it up to a strange quirk of the computer and it has never caused any issues before. I figured the computer was in sleep mode - I tried moving the mouse/keyboard and could not get the monitor to come to life. I turned the computer on and off and could not get the computer to come to life. Despite the new graphics card, it appears as though I'm back to square one.

I'm figuring that the absolute worst case scenario is that my computer was on 24/7 from Friday evening to Monday evening for 72 hours. I can't imagine that would be long enough to cause a new graphics card to fail. My room does not get that hot and my computer was cool to the touch when I felt it.


I'm thinking (and worrying) that it might be a motherboard issue, but I'm at a loss for what precisely could be causing the problem. I'm especially confused that I got it up and running with a new graphics card before I left for the weekend and now it's back to the same problem.

I'm not eager to sink any more money into graphics cards before I can really diagnose the issue.

Any help/ideas friends?
 
Hi guys - sorry for the delayed response. Thanks for getting back to me so quickly.

Here are my specs:

Motherboard: ASRock Z97 Extreme3 LGA 1150 Intel Z97 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CPU: Intel Core i5-4690k
GPU (original - when I started experiencing the issue): ASUS GeForce GTX 1080 TURBO-GTX1080-8G 8GB 256-Bit GDDR5X PCI Express 3.0 HDCP Ready SLI Support Video Card
GPU (replacement - brand new and experiencing same issue): NVIDIA GeForce GTX 1660 Ti
Ram: 1x8GB DDR3
Running Windows 10


Update: I didn't touch my computer since my last post and fired it up last night and it was working fine. I shut it down and tried to start it up again and it would not start. It was working again this morning, but when I got home from work just now it didn't start correctly until I booted it twice. Seems like the issue is only happening about 40% of the time now...

Thank you for your help!

I do not have a motherboard speaker but I will do some googling and try to figure out what it is and how to acquire one!
 
What is the brand and model name or number of the PSU.

See attachment below;
 

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Sorry for the delay! I am extremely grateful for the prompt help you all are providing - I was away all day yesterday!

It's a Corsair RM750x PSU.

It seems like the computer is working consistently when I turn the power supply off after using my PC, and then turn it back on before I power up the PC. I left the PSU "on" all night (with the computer off) and I had the same error when I tried to start my desktop just now. When I turned the PSU on and off and tried it again it worked without an issue.
 
Looks to be a problem with the power good signal between the PSU and the MB and possibly being caused by the amount of charge remaining in the system once it has been shut down or too much stand by voltage going through the MB while the computer is connected to the mains but not in use.

A couple of tests for you to do, use the computer as you normally would, gaming or watching videos would be good, when done, shut down the computer as you normally do and then try and restart it, if it does not restart as it should,, disconnect the computer from the wall socket, press the case power on button for twenty seconds or so to get rid of any charge in the system, connect the computer to the wall socket and see if you are able to start the computer.

Second test, after having done the first test above do the following and then post back with an update for us;

Some repetition I`m afraid, use the computer as you normally would, gaming or watching videos would be good, when done, shut down the computer as you normally would when not planning to use it until the next day, if the computer will not restart as it should when you next come to use it repeat the steps that you did by disconnecting the computer from the wall socket, pressing the case power on button for twenty seconds or so to get rid of any charge in the system, connect the computer to the wall socket and then see if you are able to start the computer.
 
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