电脑出现这个页面怎么办

system halted!
attention: unsupported video configuration detected

action is required

this computer has an add-in graphics card,but the monitor cable is pligged
to attach the monitor cable to the add-in graphics card:

1.shunt down the computer
2.plug the monitor cable into the add-in graphics card connector.
this may require a video adapter or video adapter cable.
(provided with the system)
3.turn on the computer.

this message should not appear after completing these steps.
for more information or help,please refer to the system documentation.

应该怎么操作啊？

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