10.04 won't boot from disc or after install

[danzda]

Help
The cd starts up fine screen shows ubuntu logo and five dots then after it goes blank and screen goes to sleep. Also after install within windows i startup into ubuntu it then asks me which to boot into; windows 7, ubuntu, or ubuntu (debug mode or sumthing like the). Please help :confused:

[danzda]

Forgot to say this if i click on boot into windows 7 it then goes back to the screen where it asks which OS to boot into. If i click on ubuntu the screen goes black. and if i go into the debugger one it goes into command line where it asks me to login, i login then it just leaves it for me to type something in the command line help! :confused: