External monitor flickering issues on T520

Hi, I have a Lenovo T520 with Nvidia NVS 4200M with the latest driver installed. I pluged both a VGA external monitor, then removed it and pluged a newer Displayport monitor and both monitors flicker. Thank youFrançois

Yes they are all on recommended resolutions. I did a factory reset on my Dell Ultrasharp monitor (with mini-displayport to displayport cable) but it did the same flickering on an older HP LCD display with VGA connexion. I'm going to try changing the vsync settings. It is on "use the 3D application setting" now but I will try "adaptive". And I also noticed there is a newer Nvidia driver from windows update, I will try that after. Thank you!Frankie

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    Message was edited by: shaneh20
    Message was edited by: shaneh20

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