08-22-2016 08:41 PM
I have a X250, I can use the my displayport to connect to a Dell monitor, but it won't work with my HP V201 monitor.
It will recognise the screen, drivers are all updated, but the screen will not turn light up.
However it will work with a VGA cable.
Cable - works
Monitor - works
08-22-2016 10:42 PM - edited 08-22-2016 10:47 PM
I would start by checking that the display driver is up to date. I would also check the resolution and refresh rate your X250 is attempting to use are amongst those supported by the monitor.