Hi ORLadyBug and phantoine,
Welcome to the HP forum!
Thank you for your posts. I am glad to help!
I understand that you DV7 will not power on. I am providing you links to Using and Testing the AC Power Adapter, Testing and Calibrating the Battery (Windows 7). and Computer Does Not Start and the LEDs Blink or the Computer Beeps. Please reply back with the outcome.