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Strange Flickering Pixels


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#1 haltandcatchfire

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Posted 13 August 2017 - 09:13 PM

My laptop is connected to an external monitor via a dock. When I look at the external monitor, there are random light colored flashing pixels jumping all over.

 

I can't connect the monitor directly to the laptop because I don't have the proper adapter.

 

In addition, the display goes completely black for a second at random intervals.

 

ThinkPad W541 with Nvidia K2100M Graphics (but I think the monitor could be running on integrated graphics, idk) and the standard Lenovo dock for this line of laptops.

The monitor is an Acer G276ML.

 

See this video: https://goo.gl/photos/qHyqszKkv3EquNUu5

 

 

Thanks for any advice!



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#2 Chris Cosgrove

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Posted 14 August 2017 - 05:19 PM

Those look like noise artifacts.

 

You say "I don't have the proper adapter.".  How exactly are you connecting this monitor ?  That looks like a DVI connector on the back of the laptop but I don't see what you are using between it and the monitor. It could well be that it is this 'not proper' adapter that is causing these artifacts.

 

You will find dead pixcels from time to time on monitors but they are static, yours are jumping around which says to me they are in the signal being received by the monitor.

 

Chris Cosgrove


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#3 haltandcatchfire

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Posted 15 August 2017 - 09:19 AM

The monitor is connected via a DVI cable to the dock, then the laptop is connected into the dock with the Lenovo proprietary connector.

 

What I meant was that I have no way to plug a DVI cable directly into the laptop. There isn't a way for me to directly connect the monitor to my computer and rule out the dock as an issue.



#4 Chris Cosgrove

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Posted 16 August 2017 - 11:19 AM

Since your last post I have looked up the manuals for your notebook.

 

According to the manual for your laptop the  docking station has HDMI, DVI and VGA ouputs (p120 of the PDF) and the specs for your monitor say that it has the same inputs. The manual also says that the laptop itself has HDMI and VGA outputs (p53 PDF). Even if you only do it as a temporary measure I would try one of these other methods of connection and see if there is any improvement.

 

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#5 haltandcatchfire

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Posted 17 August 2017 - 12:23 AM

Well, I'm not sure what happened, but it seems to be working completely fine now...


Thanks for trying to help!

#6 Chris Cosgrove

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Posted 17 August 2017 - 04:59 PM

Shall we just put it down to 'one of those things' ?

 

Still, if the problem re-occurs, according to the manual at least, you do have other connection options which are always worth trying.

 

Chris Cosgrove


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