Peripherals forum

General discussion

Flickering External Monitor

by anabranch / December 29, 2008 8:50 AM PST


I have an Acer X223w 22" LCD attached to my Toshiba laptop via a VGA cable (Vista home 32-bit). The monitor flickers noticeably. Initially I thought it was old/wrong drivers but I updated everything display related and it still flikered. Then I put the battery in my laptop and unplugged the AC adaptor and voila no flickering. Plug the power back in and the flickering returns.

I have seen posts about problems with grounding. I've tested all the outlets that the computer can plug into with an outlet tester and everything says it is correct. The power bar that the monitor and computer plug into also say that they are grounded.

Does anyone have any suggestions on what to do? Should I get a 3 prong to 2-prong converter?

Any help would be appreciated,


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it will flicker no more------------
by riteishranjan / March 2, 2009 12:52 PM PST

If there is any huge electric appliance beside ur laptop.The flickering mainly causes due to interruption of electromagnetic waves.
When u run ur laptop on is DC supply, electromagnetic waves only interfere in AC Supply not DC supply.

So, Check ur surrounding when u operate ur laptop.....It will work for u.

My suggestion works or not pls mail me to

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flickering may problem with adopter calbe
by Techie_Master / March 5, 2009 9:16 PM PST

Are you using VGA or DVI? it something like kind of electric interfernces or ground issue. regardless of VGA or DVI, you should defintely try a different cable

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Flickering... You are Genius
by akstorer / March 11, 2009 1:26 AM PDT

Thanks so much for your insight into this maddening flickering issue... your fix seemed to be sporadic though on my setup - I moved peripherals - changed power strips giving the panel its very own and still there was flicker - so I was done ... but before I packed it up to send it back (which I HATE doing) ... I decided to try one last experiment... apparently the shielded VGA cable that was shipped with the panel is not all that it could be... as when I switched back to my old (visibly sturdier) VGA cable TaTa: NO flicker at all - not matter what was running where! Thanks for pointing me in the right direction!!!

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Flickering on LCD Projector
by BillS719 / March 11, 2009 3:20 AM PDT

I ahve the same problem when using a Sony VPL-PX1 projector: flicker when PC on mains power but not when on battery.

Any suggestions for a fix??


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