7.10 install problems

[richard]

I hoping someone can advise me on how to resolve my current problem i 
have in installing 7.10.
I have received the shipit cd, changed boot sequence to start from 
cdrom...ok. I get the ubuntu splash screen. I press "install" then my 
screen goes blank with just a flashing cursor in the top right hand 
corner. I have an earlier edition of Ubuntu 6.06 and it installs fine. I 
just want to do a fresh install. My system specs are as follows: P4 D 
3ghz, 1gb ram, Nvidia 7300 AGP video card. Further to this i even 
downloaded the iso and it still does the same thing. I have also 
downloaded Mandriva and it too goes to a blank screen after the initial 
welcome screen, and selecting "install". Any advice would be greatly 
appreciated.
Thanks
Richard Bowles