Graphicscard replaced computer wont boot

[andii2030]

Hello,
i have a gateway running vista and tried to replace the graphics card, now it wont boot and when i put the other one that was in it back it still wwwont boot. wht can i do?

 

[treefrog07]

Do the require power leads from the PSU? If so, verify that the are properly connected to the card. New GPU cards usually require one or two 6/8-pin power leads.

 

[kajabla]

http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

 

[computerboi]

If you were using the integrated graphics when your GPU was not there. Then put the GPU back in. Remove the RAM and then put it back. Check if it works.