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Screen starts to flicker after logging in for a while


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#1 WindDT

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Posted 14 July 2017 - 04:16 PM

Hello

This is an entirely new issue. My screen starts to flicker after logging in/turning on computer for a while, and/or if I launch an app that uses my Nvidia card (my laptop has Optimus), I'm not exactly sure which of these two causes it. For the first while after a restart, the screen appears fine. The flickering appears on desktop background + internet browser as well, so I'm pretty sure it's not a program compatibility issue. The flickering is not severe (the type that looks like horizontal bars sliding up) but it's an annoyance.

Tried:
 

  • Disabling Windows error reporting + problem reporting service in msconfig
  • Restart computer
  • Resetting Nvidia global settings to default in Nvidia control panel
  • Checking for display drive updates in device manager (all up to date)
  • Checking monitor refresh rate (60Hz, can't be changed)
  • No errors in device manager

Laptop I'm using:
 

  • i7-4700MQ 2.4GHz
  • 1900x1080
  • Intel HD 4600 + Nvidia GT750M
  • Win10

Thanks for suggestions.


Edited by WindDT, 14 July 2017 - 04:56 PM.


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#2 jwoods301

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Posted 14 July 2017 - 04:27 PM

Could be several things...an incompatible display driver, the graphics card going bad, overheating.

 

Go in to Device Manager, expand the entries, and see if there are any warnings or errors.

 

Additionally, go to Piriform.com and download the free tool Speccy.

 

https://www.piriform.com/speccy

 

Install and run.

 

After it completes its analysis, click on File > Publish Snapshot, and then post the link you receive.


Edited by jwoods301, 14 July 2017 - 04:32 PM.


#3 WindDT

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Posted 14 July 2017 - 05:20 PM

Could be several things...an incompatible display driver, the graphics card going bad, overheating.

 

Go in to Device Manager, expand the entries, and see if there are any warnings or errors.

 

Additionally, go to Piriform.com and download the free tool Speccy.

 

https://www.piriform.com/speccy

 

Install and run.

 

After it completes its analysis, click on File > Publish Snapshot, and then post the link you receive.

 

No errors in device manager.

 

Here's the spec: http://speccy.piriform.com/results/bPC8ZfAfg3bQ5rcvggL00BO



#4 jwoods301

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Posted 14 July 2017 - 05:24 PM

CPU temp looks a little high.

 

Download and run the Intel Processor Diagnostic Tool...

 

https://downloadcenter.intel.com/download/19792



#5 WindDT

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Posted 14 July 2017 - 05:27 PM

CPU temp looks a little high.

 

Download and run the Intel Processor Diagnostic Tool...

 

https://downloadcenter.intel.com/download/19792

 

It's probably cause I was running a game when I did that snapshot.



#6 jwoods301

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Posted 14 July 2017 - 05:34 PM

I would still run it.



#7 WindDT

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Posted 14 July 2017 - 06:00 PM

That tool is not working at all on my computer. Installed it, then upon launching threw some "unhandled exception" error, then closed itself. If I try launching it again absolutely nothing happens.



#8 jwoods301

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Posted 14 July 2017 - 06:05 PM

Found the i7-4700MQ in the list...

 

https://downloadcenter.intel.com/product/75117/Intel-Core-i7-4700MQ-Processor-6M-Cache-up-to-3-40-GHz-

 

So it should have run.


Edited by jwoods301, 14 July 2017 - 06:17 PM.


#9 WindDT

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Posted 14 July 2017 - 06:16 PM

Looks like the i7-4700MQ is not supported in the tool.

 

Could be it.

 

I also noticed that the flickering seems to get weaker/stronger randomly, not sure what causes it. Sometimes it even completely stops (like right now). Theories:

  • Flickering seems to get weaker/stops if I don't use a graphic intensive program (eg game, which uses Nvidia card) for a long time. This might explain why screen doesn't flicker for first 10-20min after logging in/turning on laptop
  • Might be related to heat? No idea. But why would heat cause screen flickering?

But not really certain, especially since I never had screen flicker issue before this week.

 

Anything else I should test?


Edited by WindDT, 14 July 2017 - 06:18 PM.


#10 jwoods301

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Posted 14 July 2017 - 06:21 PM

After further research, I found your CPU in the tool's compatibility list (see modified post above).

 

Try running the hardware diagnostics on John Carrona's (@usasma on BC) site up to the Disassembly section...

 

http://www.carrona.org/strpdown.html


Edited by jwoods301, 14 July 2017 - 06:43 PM.





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