I have a New Lenovo T420 Laptop and experience some vertical lines flickers when I connect to a docking station, Have tried changing the docking station but having the same issue. If the laptop is not connected I don't experience any problem. Any idea what is happening on my Laptop and do you have any suggestions/solutions to my problem.
Its the docking port on the laptop itself. Happens all the time here at work. We usually have to do a shell swap to fix it. The pins on the dock side end up damaging the port on the laptop. This can happen if it doesnt sit 100% flat while in the dock, or if people try to remove the laptop from docks without using the eject button
Thanks Triton05! funny thing is I tried a NEW T420 laptop and it is the same thing. It still flickers when it is dock, addition to that is I tried different power socket and power adaptor still the same. I'm still thinking what else I can do about this? I am thinking to move this laptop to different station and monitor if it will resolve the issue.