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Monitor and/or graphics card problem (banding)


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3 replies to this topic

#1 ElectricWizard

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Posted 11 September 2013 - 05:28 PM

Every once in a while, at seemingly random intervals, my monitor will do this:

 

nBFndC0.jpg

 

I have no idea what it could be, but sometimes when I quit Chrome it resolves itself, but that's only about a third of the time. The other two thirds, I have to restart the computer. Today something new happened, it is doing this: 

 

F9b0kVO.jpg

 

It makes things weird and distorted because of the lines going through everything. This has never happened before, so hopefully restarting will fix it.

 

I have two monitors hooked up, the other monitor does not have either of these problems. The problematic monitor is an Acer G276HL 27", the other is a Samsung SyncMaster 2243BW 23". The graphics card is a Sapphire Radeon 7750. The problem monitor is attached via HDMI, the other by DVI. I presume the graphics driver is up to date, it's version 12.104.0.0 and is dated 3/28/2013. 

 

Anything anyone can tell me about this would be appreciated. Thanks



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#2 dicke

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Posted 11 September 2013 - 05:55 PM

Hi,
Can you swap the cables to see if the problem appears on the other monitor? Or maybe just change the cable to DVI and see if that makes a difference.
Keep us posted

Stay well and surf safe [stay protected]

Dick E


#3 Chris Cosgrove

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Posted 11 September 2013 - 06:11 PM

Your first image looks like a phase / frequency problem. From the Acer manual :

 

'Unstable picture : Check if the specification of graphics adapter and monitor is in compliance which may be causing the input signal frequency mismatch.'

 

You certainly have an unstable picture !  But the fact that it only happens with the one monitor and not both points the finger at the Acer and its connection. Again, according to the manual, the Acer can use both DVI and HDMI connections, so I would suggest :

 

1   Try a DVI connection and see if the problem continues

2   Try a different HDMI cable

3   Check that the video card output - resolution and refresh rate are within the limits for the monitor.

4   Connect the Acer to a different computer and see if the problem occurs - if it does, this really does suggest a monitor problem and it's probably time  to take it to a specialist repairer.

 

Chris Cosgrove



#4 dark.knight

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Posted 27 November 2013 - 10:44 AM

Your first image looks like a phase / frequency problem. From the Acer manual :

 

'Unstable picture : Check if the specification of graphics adapter and monitor is in compliance which may be causing the input signal frequency mismatch.'

 

You certainly have an unstable picture !  But the fact that it only happens with the one monitor and not both points the finger at the Acer and its connection. Again, according to the manual, the Acer can use both DVI and HDMI connections, so I would suggest :

 

1   Try a DVI connection and see if the problem continues

2   Try a different HDMI cable

3   Check that the video card output - resolution and refresh rate are within the limits for the monitor.

4   Connect the Acer to a different computer and see if the problem occurs - if it does, this really does suggest a monitor problem and it's probably time  to take it to a specialist repairer.

 

Chris Cosgrove

now that i am a member i want to thank you Chris, a month ago i googled my head off trying to find a solution to my problem, i found your post and LUCKILY it was the HDMI cable :) so thank you again






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