Even though Dell doesn't produce the Dimension 2400 anymore and the system is incompatible with many third-party video cards, the video on this PC is still upgradeable. The Dimension 2400 only uses PCI expansion slots, which graphics card and motherboard manufacturers had abandoned for AGP, a dedicated graphics interface. PCI Express, a faster, more advanced interface, replaced AGP technology, so computers with only PCI expansion slots are becoming rare. But users who want to squeeze a little more usefulness out of their older PCs can still upgrade their PCI video cards.
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Right-click the "My Computer" icon and then click "Properties."
Open the Device Manager and click the "+" next to "Display adaptors."
Double-click on the Intel adaptor and select "Do not use this device, disable" under "Device usage."
"Apply" the change, click "OK" and restart the computer.
Press "F2" when the Dell logo appears at start-up.
Select "Primary Video" or "Primary Video Controller" with the down arrow.
Change to "Auto" or "PCI."
Press the "Esc" key to exit and save the changes.
Turn the power off as the system restarts.
Unplug all cables.
Press the power button to ground the motherboard and discharge any residual electricity from the power supply.
Lay the computer on its side with the motherboard towards the bottom.
Remove the computer cover by disengaging the cover latch at the back of the computer case and sliding the cover towards the rear of the computer.
Unscrew the cover at the PCI slot you will use for the video card installation.
Align the card with the PCI slot and push it into place. Reinstall the cover plate screw into the video card bracket at the rear of the computer case.
Replace the computer cover.
Reconnect all computer cables and turn the system on.
Cancel any Windows attempts to automatically install video drivers if you have an installation disk. Load the installation disk into the CD drive and install the video drivers per the instructions.
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