These are needed for the monitor to have something to display, that port is a must have. You can disable current port and then use another video card in place of your current video port or card. This will help in t/s'ing the problem.
my display card seems out of order.
I would like to verify.
If I unplug the display card from the motherbaord then boot computer. Will it still display the bios by pressing delete?
And if so, does it mean that my display card out of order if i plug in then reboot but finally said: enter power safe mode ?