I just installed Fedora, I tried changing the video card driver, and now I cant see anything but the boot screen, Is it possible to do a command to bring back the old video card config from the bootscreen?

]now placed in the correct section, sorry[

so when you get nothing you mean that immediately after you select boot from linux your monitor goes all black? if its not to big a hassle the easyist way might be to just reinstall fedora and set it up with the default monitor or whatever video driver was working before.

if thats a hassle, then you would want to try switching to a different terminal window by pressing "ctrl+alt+F1" or F2,3 etc... one of those will get you a command line. login as root (type "su" and then the password) and then you can try messing with the XF86Config file. (this file manages settings for your video card and monitor) here's where it gets kinda tricky and i don't have a lot of time right now to explain further details. you might want to do a search on LQ or google for the XF86Config file to see exactly what values you need to change. you'd better find your video card manual as well because that will give you some specs that you might have to enter into the XF86Config file.

if you don't know how to locate your XF86Config file or how to edit it make a post saying you don't and myself or someone else who may have the same or easier solution will be able to help you out.

don't despair. a while ago i was ripping my hair out and staring at a black screen. but just to reiterate, if you haven't done a whole lot already since you "just installed fedora" your best is probably reinstall the os. but then you won't learn anything i guess.