HP Pavillion dv9420us won't turn on

I called HP support to find out what the issue was and they want $50 to tell me what's wrong with my computer. I am trying to fix this issue myself, if I can.
I put my computer on hibernate earlier this afternoon, and when I returned to it (after an hour) it won't turn on. I have tried removing the battery and power supply, then holding down the power button to reset it. I have tried just unplugging it from the power supply and starting it. I have tried removing the battery and only leaving the power supply plugged in to start this thing. Nothing has worked! I really don't want to have to pay money to find out what's wrong with my two-year-old laptop, then pay to have it fixed!
Can anyone give me any other suggestions?

I have exactly the same problem with my DV8210US. How to persuade or pressure HP to recall?

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Hello @stacey71,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your computer is not able to boot with the power adapter plugged in, and with no battery. Are you still able to boot into Windows with the battery installed on your notebook? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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HP Pavillion dv9420us won't turn on

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