PC ports not working? Please help!

  Secret-Squirrel 16:21 23 Jun 2014

" ...my computer has this 1 D-SUB port and it had a plastic cover on that said "dont remove"......................When i plugged the cable into the computer and monitor, the screen just didnt get a signal"

That sounds completely normal.

When your PC manufacturer installed the separate graphics card, this disables the onboard graphics built-in to the motherboard so they put a plastic cover over the port to try and prevent you from using it.

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