On the boot up screen the card starts showing vertical lines, it then freezes on the windows xp boot up. When i start windows xp in save mode the card has the vertical stripes. I also have an old pc with an agp port with win98se installed where the pc can at least boot up, but only in 16 colors and with the stripes in the background.
I tried reinstalling drivers, switching screens and pc's but it stays the same.
Is it a new graphic card? Sometimes that happens when the graphic card gets overheated and fries up some chips. and sometimes those lines appear when the graphic card has fault in Direct Draw. Try setting your BIOS settings to default. if it doesn't work, i recommend you to take the graphic card to the nearest hardware tech ;)
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For windows to work, it needs the card's drivers to display properly. The bios will display, and the beginning of windows load messages will show, but then it switches to the installed display driver. Take the card out, and use the old display method, and load the drivers for the new card. Then set the screen resolution to 800x600 and the shutdown, and install the new card. The bootup should go correctly, and once the new drivers are in, then set the resolution desired.
You could try to insert your XP disk and boot from it. It might have a recovery option. If so, select it, and you should be able to repair Windows and keep your data. If not, I'm afraid all you can do is reinstall it.
If your new video card has a power connector, make sure it is connected to a power plug. If you already did that, it's possible your PC's power supply doesn't have enough power to run all your connected equipment.
To get your old card running, hit F8 repeatedly during boot-up until you get the boot options. Select VGA mode. It should boot up properly then.
Once booted into VGA mode, set your screen resolution to something simple like 1024x768 or 800x600, then reboot.
If that doesn't work, try hitting F5 repeatedly during boot-up to boot into Safe mode. You can then adjust your settings again there.
in safe mode your "graphics accelerator" doesnt kick in, it runs a slow standard VGA commands. If your card was damaged by usualy overheating or just itself (bad luck, happened to me on 6600gt) it will die either quick or slowly. Slowly means, first "Direct 3D" will show rubbish on screen, the "OpenGL" and later even in windows it displays lines and freezes. After that, you cant even go to BIOS cause if freezes 5 secs after boot. Mine died that way.
TRY another card, cheapest u can get or borrow but the same port AGP or PCX, whiever u have. If all is ok, the card is gone. (sounds like it 90%)
Firstly, start your pc in safe mode (f8) on boot up.
This will start your pc in vga mode, and hopefully the lines are still there, which will indicate a faulty graphics card, if they aren't it may be a problem driver.
If no lines, go to Add/remove programmes and uninstal your graphics driver.
Re boot pc then when it finds your card make sure you point Windows to the folder in which you have saved the driver files.
The driver should then install, see if any change.
You may have to try some older drivers, as Nvidia can be awkward at times.
I have had varying problems with Nvidia and replaced with ATI cards with no problems.
Either your graphics agp slot needs the driver updating or the card itself is faulty, check the agp slot for dust and gently moneuvre the card in the slot to see if the lines appear to change and check that therea are no bent pins in your connecting plug or card.