Hi there
I hope you find your Support Forum experience a positive one! It is a great place to find the help you need, from other users, HP experts and other support personnel. I understand that your computer is not starting properly. I am happy to help with this.
Please read through this document, and follow the most applicable symptom from any list. HP PCs - Computer Does Not Start (Windows 7) If at the end there has been no change ot if directed to contact HP Support, please use the following http://www.hp.com/contacthp and create a case for your issue. If you live outside the US/Canada, please click the link below to get the contact information for your region. http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
Please let me know whether that works for you, and if it does resolve your issue, please mark this post as a solution. Kudos would also be appreciated.