I have a dell dimension 4400 and the original graphics card thats came with it but yesterday i when too turn on my computer and the screen is not picking up and image from the CPU is there anything i can do to install a new PCI graphics card with out having too install the new graphics card

OK, I am curious how are you going to install a new graphics card without installing a new graphics card? "picking up and image from the CPU is there anything i can do to install a new PCI graphics card with out having too install the new graphics card"

You can install a different graphics card in the computer assuming you have an open expansion slot. If the Current Graphics card is actually installed in the AGP slot open the Main CPU unit and remove it then install the new card. If when you started the computer you saw anything on the screen, the DELL logo or Bios setup, the problem most likely is not the graphics card being bad but possibly that the settings in windows some how changed and it is set to something it can't support or the monitor has gone out. If it is the graphics card and it is built onto the motherboard you will have to install the new card and when the computer starts enter the Bios to change the BIOS settings to disable the on board card or it will give you problems with conflicting resources. Most graphics cards use the same resources so two cards in the same computer will conflict with each other and neither will work. I would test with a different monitor before replacing the graphics card.