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HP PROBOOK 640 GI DISPLAY PORT refuses to work after clean OS install
So I re-installed the OS on a HP PROBOOK 640 GI I installed windows 10 pro. I have used a driver program to check the drivers and they are all up to date. The issue is the display port used to work before the install but after I can only make the anolog side work for the second screen to be attached to this laptop. The HDMI ( display port ) version of the laptop will no longer work. I tried several different cables and adaptors for the HDMI display port but it refuses to see any monitors. It will see monitors when I use the old style anolog but it seams the visual quality is not as good as the display port.
WHY after a clean OS install would the display port stop working. ?
Any ideas why it wont work ?
I also installed the monitor drivers. Still no
Thanks