installation at HP compaq nc6000

Could be the RAM you have, you need minimun 1GB in Ubuntu 10.10, ¿your laptop have 512Mb?

Did you MD5 test the iSO you downloaded?
If you are using a CD/DVD, did you burn it as slowly as possible and did you make the CD testitself for consistency once it started to boot?
512Mb is enough RAM for Ubuntu, the minimum requirement is 256Mb so don't sweat about RAM.

yes i am using 512 mb of RAM only , for that which version or which Linux flavor should i use ?

instead od MD5 test i have perform all the step successfully u have asked
..

On Sat, Apr 23, 2011 at 2:07 PM, actionparsnip <
<email address hidden>> wrote:

> Your question #153937 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> actionparsnip requested for more information:
> Did you MD5 test the iSO you downloaded?
> If you are using a CD/DVD, did you burn it as slowly as possible and did
> you make the CD testitself for consistency once it started to boot?
> 512Mb is enough RAM for Ubuntu, the minimum requirement is 256Mb so don't
> sweat about RAM.
>
> --
> To answer this request for more information, you can either reply to
> this email or enter your reply at the following page:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> You received this question notification because you are a direct
> subscriber of the question.
>

and how to test MD5 in windows OS ?

On Sat, Apr 23, 2011 at 2:07 PM, actionparsnip <
<email address hidden>> wrote:

> Your question #153937 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> actionparsnip requested for more information:
> Did you MD5 test the iSO you downloaded?
> If you are using a CD/DVD, did you burn it as slowly as possible and did
> you make the CD testitself for consistency once it started to boot?
> 512Mb is enough RAM for Ubuntu, the minimum requirement is 256Mb so don't
> sweat about RAM.
>
> --
> To answer this request for more information, you can either reply to
> this email or enter your reply at the following page:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> You received this question notification because you are a direct
> subscriber of the question.
>

Instead of asking, you should websearch. Please do this in future. You would have found this guide:

https://help.ubuntu.com/community/HowToMD5SUM

A link http://homepages.ihug.co.nz/~floydian/md5/md5v12005.zip, but your problem could be in the ram, it is true that could operate at 512 Mb but from personal experience I can tell you there are many who do not

i have checked for MD5 test its completed successfully..

On Sat, Apr 23, 2011 at 2:42 PM, actionparsnip <
<email address hidden>> wrote:

> Your question #153937 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> Status: Open => Answered
>
> actionparsnip proposed the following answer:
> Instead of asking, you should websearch. Please do this in future. You
> would have found this guide:
>
> https://help.ubuntu.com/community/HowToMD5SUM
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/ubuntu/+question/153937/+confirm?answer_id=5
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> You received this question notification because you are a direct
> subscriber of the question.
>

yes its showing a blank screen , nothing displaying on that

On Sat, Apr 23, 2011 at 2:54 PM, pankaj <
<email address hidden>> wrote:

> Your question #153937 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/153937
>
> Status: Answered => Open
>
> You are still having a problem:
> i have checked for MD5 test its completed successfully..
>
> On Sat, Apr 23, 2011 at 2:42 PM, actionparsnip <
> <email address hidden>> wrote:
>
> > Your question #153937 on Ubuntu changed:
> > https://answers.launchpad.net/ubuntu/+question/153937
> >
> > Status: Open => Answered
> >
> > actionparsnip proposed the following answer:
> > Instead of asking, you should websearch. Please do this in future. You
> > would have found this guide:
> >
> > https://help.ubuntu.com/community/HowToMD5SUM
> >
> > --
> > If this answers your question, please go to the following page to let us
> > know that it is solved:
> >
> https://answers.launchpad.net/ubuntu/+question/153937/+confirm?answer_id=5
> >
> > If you still need help, you can reply to this email or go to the
> > following page to enter your feedback:
> > https://answers.launchpad.net/ubuntu/+question/153937
> >
> > You received this question notification because you are a direct
> > subscriber of the question.
> >
>
> --
> You received this question notification because you are a direct
> subscriber of the question.
>

If you have an md5 check is successful then discard the CD, he starts the installation and make the necessary checks to start pressing the escape key and check if it shows any error or warning about hardware

@Eduardo: I installed for test 10.10 on 512MB MB virtual machine, so it should be OK.
If you get a blank screen, look at http://www.ubuntugeek.com/how-to-fix-ubuntu-10-04-lts-lucid-blank-screen-at-startup.html