When I install the card and drivers, the computer sometimes boots up to the Vista desktop, but soon begins to reboot repeatedly. Other times (more often than not) after booting up, the monitor displays a prompt saying "NO SIGNAL"
Mainboard : ASUSTek
Chipset: nVidia nForce4
Processor: AMD Athlon 64 5700+ @ 2211 MHz
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Re: No signal to monitor
Verify card is seated properly.
Check bios settings. ie. disable onboard video, enable PNP OS installed, enable "assign IRQ to vga", disable shadowing and caching, enable passive release, enable delayed transaction, vga boot sequence: AGP, set graphics aperture size to 128MB, disable turbo modes.
Verify power supply is at least 350 watts.
Reboot into safe mode (press F8 right after the BIOS POST screen and before the windows loading screen) and use the program, Driver Cleaner Pro to remove Nvidia video driver remnants. Don't select all of the options, just the Nvidia driver and the plain ATI selection.
Verify the monitor cable is securely connected to both the monitor and the computer.
Verify that you have connected the cable to the vga port on the card and not the onboard vga port. (I'm not implying that you are dumb or anything like that, but sometimes even the best of us, overlooks the simple things... especially me! LOL)
Verify the monitor cable is good.
(Last but not least), try using another monitor to test. (Could be an incompatibility with the monitor.)
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boot in safe mode keep hitting f-8 key while booting when in safe mode delete all video drivers that are not used make sure your hard ware drivers are installed for board,should work after 1st try if not reboot in safe repeat steps,good luck!!
I don't know if you have tried this yet, but here goes......
When the PC first powers up, hit the F2 or delete key to enter the setup page. See if there is a spot where you can disable the onboard graphics, then save the settings, reboot the PC, and see if this helps the problem. And there is always the chance that the graphics card is no good. And nothing but a return, and a new card will solve the problem.
I have the same system and card. The problem is the system is trying to run two monitors at once. Use Windows safe mode (F8 during boot) to uninstall any Pny drivers you may have put on. Reboot. Install the pny drivers again. Before rebooting, use the device manager to look at the display drivers. There should be two, an Intel one, and the pny Nvidia one. Disable the intel driver and reboot. Worked for me. Youmay also want to upgrade the power supply. The 3000 has a 225W and the 8400 card wants at least 300W.
stick another card , agp pci or whatever you can get easiest in a slot . if it works....hmm bad onboard video. if not could be mb , motherboard , over heating or cpu. are fans spinning full speed ? reboot then go into bios, usually del key. and check motherboard temp. after failure.
There's a chance that your screen resolution is set higher than your monitor can handle. Try booting into safe mode and see if you can resolve the problem. You may also have to configure the BIOS to use the expansion slot that your using for the primary video, and turn the integrated (on-board) one off. (If you haven't already done so)
Download the unified Radeon drivers from ATI's website... do not use Windows update. Get the Drivers Only package. for Vista 32-bit
If you can get to the desktop: Uninstall the existing display drivers by using the remove hardware utility. Whatever they are... remove them. Reboot. Windows will try to reinstall the drivers on the next boot. If it allows you cancel the installation at any time during install do it. Run the downloaded package from ATI. Reboot.
If you can't get to the desktop: Press F8 when booting and enter safe mode with networking. Download the ATI drivers from ati.com for Vista 32-bit. Uninstall the display drivers. Reboot. Should take you to the desktop on the next boot so you can run the install program.
Don't boot with the monitor connected to the card. You need to let it boot into windows and install the drivers for it first. Once you do that,shutdown and restart with the monitor plugged into it and it should work.