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Windows 7: Flickering Green Pixel Issue = Monitor Or GPU

15 Jan 2017   #1
Deviancy

Windows 7 64bit
 
 
Flickering Green Pixel Issue = Monitor Or GPU

Back in October I started noticing flickering green pixels on dark backgrounds on my screen, the flickering green pixels, when they are present are always in the same place.

The first thing I did was buy a new DVI cable and then I ran it from the monitor to a different DVI port in back of the GPU. The issue seemed fixed but then a day later the intermittent green pixels came back, at that point I totally uninstalled the newer Nvidia drivers I had recently installed using DDU and installed the drivers I never had issues with which were from early 2014. After I did that the problem seemed gone and everything was fine until last month when I replaced my mouse. I noticed my mouse pointer had three black dots following behind it in a horizontal pattern. I then removed the Nvidia drivers from early 2014 and installed the most current Nvidia drivers, I believe they're from the 14th of December. After I did this the three black dots following behind the mouse pointer vanished but a week or two later, the intermittent green pixels came back.

1. The intermittent green pixels do not show up in screenshots, I've taken numerous screenshots of the screen when they are present but in the screenshots they are nowhere to be seen.

2. They're showing up more often lately.

3. They don't seem to show up when if I set the display to a lower resolution or when I'm in the bios screen.

4. The GPU is a Nvidia 450 GTS and it is not overclocked and is usually running at 29c, the fan is running smoothly

5. I'm seeing colored lines on the top edge and left edge hand of the screen in Transformers: Devastation at times but if I alt + tab out of the game and then re-enter the game the lines are no longer present until the next level loads.

When I take screenshots of the game when those colored lines are present, those colored lines, much like the green pixels on dark backgrounds, aren't present.

The only two games I'm noticing the "lines" on are both Platnium games (TMNT: MIM & Transformers Devastation, other games don't have any issues) so I think that's an entirely different issue, could be wrong.

I don't have an extra monitor or GPU to try out to test to see which one of the two is the issue so I'm hoping the screenshot thing answers the question?

For the record, the GPU is 5 years old and the LCD monitor is nearly 10 years old.


My System SpecsSystem Spec
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15 Jan 2017   #2
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Hello and welcome Deviancy now my first thought was the monitor may be going south but in view of the changes around you swapping cables and drivers and the fact that the card is five years old now makes me wonder if the card is going south.

Have you access to another monitor to see if the same thing happens?

Second it may as well to test that card with this FurMark: VGA Stress Test, Graphics Card and GPU Stability Test, Burn-in Test, OpenGL Benchmark and GPU Temperature | oZone3D.Net now this can put a fair bit of stress on the card so best run when you are nearby to check things like temps etc.

Edit: Now here is a site that has many tests for monitors just be aware that I have not tried any of them bar the second in line (Checkmon) and the one that I liked actually ran lines across the screen and check the pixels out but I cannot pin it down as yet.
BenchmarkHQ
My System SpecsSystem Spec
15 Jan 2017   #3
Deviancy

Windows 7 64bit
 
 

Quote   Quote: Originally Posted by ICIT2LOL View Post
Second it may as well to test that card with this FurMark: VGA Stress Test, Graphics Card and GPU Stability Test, Burn-in Test, OpenGL Benchmark and GPU Temperature | oZone3D.Net now this can put a fair bit of stress on the card so best run when you are nearby to check things like temps etc.
I ran Furmark for awhile and didn't notice any artifacts and it didn't go over 65c after 20-25 minutes.

I haven't noticed the green pixels in games but games are always "moving", these pixels seem to only show up on parts of the screen that are 'static'. For example, if I go to Vudu.com where the screen has a black background and is static, the green dots will pop on and off on the screen, or if I select an all black wallpaper, they'll come and go on that screen.

They're always in the exact same spot on the screen, they never are in other areas of the screen and the minute I scroll the window up or down, they go poof.
My System SpecsSystem Spec
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16 Jan 2017   #4
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Ok mate well it is pointing the finger at the monitor in my mind. As you say it would be hard to pick those pixels using a game - which leaves us with the pixels in the exact spot each time now suspect.

Now there are some programs that will test the monitor such as PassMark MonitorTest - Test monitors and LCD flat panel screens and some that will attempt to correct the problem but I shall ahve to go digging around for them as I have used some but quite a while ago and they were of soem help and did not really fix the issue.

Now I mentioned do you have another monitor to try because if the pixel issue is not there then it will mean the monitor you have is maybe going south.
My System SpecsSystem Spec
16 Jan 2017   #5
Deviancy

Windows 7 64bit
 
 

Quote   Quote: Originally Posted by ICIT2LOL View Post
Now I mentioned do you have another monitor to try because if the pixel issue is not there then it will mean the monitor you have is maybe going south.
Sadly, I only have an ancient 4:3 CRT monitor which of course doesn't go to 1920x1080, and I'm only noticing the issue at 1920x1080, doesn't seem to appear at lower resolutions, especially 4:3 resolutions. And yeah, the pixels, when they show up, they're always in the exact same area of the screen. One other thing I noticed, not sure if its my mind playing tricks on me, the refresh rate seems to be off a bit, like it'll flicker at times when loading a new page.

I did a little more testing and booted into safe mode and in safe mode, I waited 10-15 minutes and the flickering green pixels did not show up. So at this point I'm back to wondering if it is the GPU since under safe mode the Nvidia drivers aren't loaded, or so I assume since the Nvidia processes don't show up under Task Manager.

Not sure what to do next at this point. I've already removed the latest drivers with DDU and rolled back to the ones before the issue happened which just resulted in the black dots that trail the mouse pointer, and then I DDU'd those and went back to the latest Nvidia drivers. Then like I said, I replaced the DVI cable already with another one and I tried the secondary DVI port on the GPU to make sure it wasn't a port issue. I haven't re-installed Windows 7 since the 1st of 2014 but I don't think re-installing Windows 7 would do anything since I've only installed the latest version of Adobe Flash and Air since this started happening and neither of those two programs should be causing this. I considered inteferrence from the wireless router since its just a few inches from the monitor but the router has been in the exact same spot for nearly two years.

Hypothetically, if it is the GPU, and I'm an EVGA guy, what is the most affordable EVGA GPU on the market that is about the same as the GTS 450? I wouldn't need a 150-200 dollar GPU, I'd just need one that runs as well as the GTS 450 since I have no intention of buying any modern games. And if it is the monitor, who makes the best monitors these days? It used to be Samsung but I looked those over, they all seem to just have VGA and HDMI ports these days, I'd need a monitor with a DVI port.
My System SpecsSystem Spec
16 Jan 2017   #6
Megahertz07

Windows 7 HP 64
 
 

Please edit your profile with ALL hardware specs.
What MoBo you have?
Does it has on board video?
My System SpecsSystem Spec
16 Jan 2017   #7
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Quote:
Sadly, I only have an ancient 4:3 CRT monitor
Ok mate you have it right there a CRT monitor does not have pixels it runs on a different system (a cathode ray tube - CRT - as per the old TV systems had) to LCD / LED monitors which do have pixels.

Now this puts a slightly different angle on what the issue is and comes back to the machine and the card.

Now there are two things you can do and although it may ramp up the budget it may well cure the problem. Plus a LCD screen will cost less to run by a fair bit.
Now I know you like EVGA but I prefer Asus and this would be my choice - $169 out here Access Denied and I don't knoq quite where you are but if in the US you can get it for $104 from Newegg ASUS GeForce GTX 750 Ti STRIX-GTX750TI-OC-2GD5 2GB 128-Bit GDDR5 PCI Express 3.0 HDCP Ready Video Card - Newegg.com

Now as Megahertz has asked mate can you update the system specs too if you are having difficulties in finding details just follow this and use PART B: yo see what is inside the system.

Using HW Info
PART A:
You can test the volts on the PSU with HW Info HWiNFO, HWiNFO32/64 - Download < download the right bit version and close the right hand window select Sensors and scroll down to the power section where you will see what the volts are doing see my pic. In my pic the section (Nuvoton) with VBATT as a dead give away you are in the section for the rail voltages. There are other section titles and one that pops up often is ITE (sometimes the usual one for Gigabyte boards)
Now the voltage on the different rails have to be within 5% =+/- of what is required or the machine will not work properly if at all.
Limits +/- (minimum - correct - maximum)
12v1 = 11.4 - 12 - 12.6v
12v2 = 11.4 - 12- 12.6v
5v = 4.75 5 - 5.25v
3.3v = 3.135 3 3.465v
-12v = -10.80 - -12 - -13.20v
+5VSB = 4.75 5 - 5.25v
The Power good signal voltage at pin 8 on the 24 pin plug (grey cable) should be the same as the 5v rail reading/s
See this for the rail voltage info
PSUs 101: A Detailed Look Into Power Supplies (Section 2.)
The original right hand window shows the machine running and is handy for that but for looking at the components in some detail close it and use the main left hand side panel
FOR OTHER COMPONENTS
PART B:
Open each small square with + in it on the section the components are in and then click on the individual component/s (it will highlight in blue) - in the right hand side will appear all sorts of details including brands speeds and other essential info that particular device. See pic for example.


Attached Thumbnails
Flickering Green Pixel Issue = Monitor Or GPU-hw-info-network-adaptor.png   Flickering Green Pixel Issue = Monitor Or GPU-hw-info-devices.png  
My System SpecsSystem Spec
16 Jan 2017   #8
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Ok Deviancy I have been thinking about the problem and having said what I did about the card I think it would be really good for you to try another monitor on that system first. If the problem goes away it then means just getting anew monitor - which in nay case you are going to have to mate because of the age of that device.

The fact is that CRT types devices (same principles of vacuum tubes) do wear out over time because of the physical nature of their operation. Cathode ray tube - Wikipedia

One word of warning do not tamper with the back of the tube ie taking the cover off - as there are some extremely high voltages generated at the rear of the tube for its operation.
My System SpecsSystem Spec
16 Jan 2017   #9
Deviancy

Windows 7 64bit
 
 

Heres the PSU voltage info from HWinfo..



I believe its a 600 watt cooler master but I can't pop the case right now.

As for the mobo, it doesn't have integrated video and it's an Asus P8P67 LE.

Still shopping for another monitor, so far no luck and now I'm having speed issues with my Roku so I'm currently also troubleshooting that, probably just DNS issues.
My System SpecsSystem Spec
17 Jan 2017   #10
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Yep the PSU is fine mate but what I meant by using PART B: was to to go to the individual components - you don't need the Sensor button and when you open each of those components it shows in sometimes very great detail the device and speeds, volts. timings etc etc If you see my pic I'll try and show you how it will look. I hope it makes sense.

Now monitors always best go with a brand name one and the size and type I guess is down again to your budget. Personally for general use a TN panel is fine but if you want something fancier an IPS screen is also good but overkill in my mind. For size again your choice but a 24" is a good size.


Attached Thumbnails
Flickering Green Pixel Issue = Monitor Or GPU-part-b.png  
My System SpecsSystem Spec
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 Flickering Green Pixel Issue = Monitor Or GPU




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