Hello,
Thank you for posting in the HP Support forum. Welcome onboard!
I am sorry for the issues you experience with your HP computer.
Please, review these HP official articles about such issues you experience now. Follow the appropriate steps that fit your case to attempt to fix the issue:
>> http://support.hp.com/us-en/document/c03513214
>> http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03561545-4
>> Interactive guide > http://hp.dezide.com/ts/start.jsp?guide=NoPowerorBootIssues.net§ion=ccweb&as=true&SFS=tdoc
If you did try everything but nothing helped, I am afraid you will need to bring your computer (or ship it) to service - HP Authorized service center. Please, contact HP Support for free warranty support/service
> http://www8.hp.com/us/en/contact-hp/contact.html
> http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
Let me know how it goes. Provide feedback and do not hesitate to post again if you face difficulties.
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*** I work for HP *** I express personal opinion only *** HP Expert - Volunteer since 2013