This forum being geared specifically towards Windows 7 does not, in anyway, mean that we can help you any more than any other forum. Your issue is a hardware one that is not related to drivers
or anything else related to software. We are, of course, more than happy to help as much as possible. Did you read over the article I linked to. Did anything in that article help you find the cause of your issue.
And yes, you should mention anything you have already done to troubleshoot your issue. Otherwise you can't hold it against us for telling you to do things you have already tried.