Projector's image FLICKERS when projector is plugged in.

Hello,

I am using Windows 8.1 64 bit (6.3, Build 9600) in my laptop (Lenovo Y510P). When I connect the VGA Port of my laptop to a projector and choose the duplicate screen option (Fn+F3 in my laptop), the display projected on the (exterior) screen starts flickering wildly. At the same time the display on my laptop screen is stable (the resolution changes, but apart from that it's okay). I have tried it with four different cords (and projectors), so I suppose that it may not be an issue with the display cord(s). My laptop is relatively new (still covered under warranty) and this issue started with my laptop since the first time I tried to connect the VGA port to a projecter. Is this a hardware issue with the VGA port of my laptop or is there a possibility that it may be a software (driver) issue also? Any help would be much appreciated!

Thanks!

You need to go into your display properties and change the refresh rate for that output.

So, I went into (RightClick)-->Screen Resolution-->Advanced Settings-->Monitor. When no projector has been connected, I see only one option for the 'screen refresh rate' which is 60 Hz (the screen resolution is 1920 * 1080). When I switch to the duplicate screen option, I see more options for the 'screen refresh rate', higher ones including '85 Hz' and lower screen resolution. Should I connect my projector and then change the screen refresh rate to the highest possible value (which is 85 Hz) and then expect the flickering to stop? If your answer means that there is no hardware problem in my laptop and if this works out properly then I owe you loads of thanks!

You have to do it when the projector is plugged in.