I work in the computer industry (and have for the past 21 years).
In your situation, your questions are about a specific piece of hardware, so your best bet is to go to the HP web site. They have a forum there where you can post questions.
Use this URL:
http://welcome.hp.com/country/us/en/support.html?pageDisplay=support
Click on Notebooks & Tablet PC's, then just keep drilling down to your model. When you reach the page for your model, there should be a "Support Forums" link under "Resources" on that page. That will take you to the forums, which you can search and/or post questions.
I've received help there with a HP printer problem and server hardware problem.
For general help, my #1 A+ resource is the Usenet newsgroup archive at
http://groups.google.com. I find this
invaluable. I use it practically every day. By doing a search, I can often find answers to just about any question (computer or not) based on past postings.
If you don't find your answer on the HP forums or on a groups.google.com search, you can post something to the newsgroups via Google.
The relevent newsgroups you would be interested in using are:
comp.sys.hp.hardware
HP Laptop Help Support