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If you are certian the pc is powered on, check the video card and any new card that has been added to the pc. If you have a video card installed, remove all other cards and retry your boot. If you still have no video, replace the card. If the video connection is on the board and you and have added a new video card, use the "old" connection to open your operating system and configure the video setting to use the new card and change connection. Good Luck, C2Solutions
Turn the computer off, and disconnect the AC power.
If the motherboard has an "integrated" video-adapter, connect one monitor to its VGA port, and connect another monitor to the VGA port on the add-in video-card, and turn the computer on, and watch both monitors, to see which one becomes "primary" and which one becomes the "secondary" monitor.
Reboot, and enter BIOS SETUP, and "disable" the "onboard" video-adapter, then "save and exit" and reboot. Now, which monitor stays "dark" and which monitor is "primary" ???
First you MUST install Service Pack Two. That "device cannot start", it simply means that the "Drivers" will NOT load... but this is really of NO consequence, IF the "Generic" Windows Drivers work, then this is just as good, and in some case better than any other driver, PLUS they WORK. Have you downloaded the latest NVIDIA Drivers? Also you may have to install the entire Drivers Package and not just the "Drivers" alone. That NVIDIA card is an "Older" card, you may indeed be better off with a new more modern card, now NVIDIA, is OK, but I personally like ATI better.
I assume by power is good you mean when you press the power button on the pc it spins up.
1) unplug all the components such as hard drive, floppy and USB from the motherboard. (so you should only have the VGA, monitor and motherboard with RAM and CPU.) turn it on and see if you get a screen. if you don't there is possibly a problem with the motherboard.
if you do get some display on the screen 2) switch off and plug in one component at a time and then switch back on. if it works turn it off and plug in the next component and turn it back on. repeat until you find the faulty component that cause it to not turn on.
You were not very clear with your question. If you mean you have disabled your onboard video, then installed the new video card and get nothing then the card is not compatible with your system OR you got a bad card.
If you mean you simply installed the card, turn on your computer and get nothing until you move your monitor plug back to the original port (without turning off the computer) then you must disable your onboard video by going into your BIOS settings. Follow the instructions that came with your video card or your computer to do that. Usually you get in by pressing delete or F2 while the computer boots.
Unplug your computer, open the CPU and remove the old graphics card (the one where you attach your monitor cable) and replace with your new graphics card. Handle the card by the edges and avoid touching the sensitive electrical components. Insert it fully to the card slot (a loose video card will prevent your monitor from working). Once the computer prompts you that you need the driver for it, just insert the CD that comes with the model of your new graphics card and follow the directions.
as for the pcie slot you need to enter the startup setup and choose the graphics card that your computer uses which is mainly the "integrated periferals" menu, then choose that the pcie card is your primary graphice card or simply disable your older card.