Unfortunately, there is no way to give you focused help with so little
information. Please review this link to see what details you need to
provide in order to get newsgroup help: http://www.dts-l.org/goodpost.htm
Testing hardware failures often involves swapping out suspected parts with
known-good parts. If you can't do the testing yourself and/or are
uncomfortable opening your computer, take the machine to a professional
computer repair shop (not your local equivalent of BigStoreUSA).
