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 battery...it 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 -email@example.com
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,