When trying to turn on the laptop, the f12 key blinks.

[JamesUp]

Hello, the product I am using stopped working out of the blue. The laptop won't turn on and when I try, the f12 key has one long blink. I saw a post from a while ago with the same issue, but they said it was fixed, but when I went there, the question that fixed the issue was a link to a phone number. I don't like the sound of my voice, so I decided to try this: If someone knows how to fix this problem, could you please just message it under this question? I don't want to call someone for this. 

[Echo_Lake]

@JamesUp

Thank you for posting on the HP Support Community.
 

Don't worry as I'll be glad to help, to provide an accurate resolution, I need a few more details:

• Did this happen after a recent window or software update?
• Did you make any changes to the settings of your PC prior to the issue?

While you respond to that, let's try these steps: 

Hard Reset: Follow the steps from the link: https://hp.care/2GnkMa8. (Refer to the removable and sealed battery)
BIOS default:(do not skip any troubleshooting steps even if you feel steps are repeating)

1. Turn off the computer and wait five seconds.
2. Press the Power button to start the computer and repeatedly press the F10 key to enter the BIOS setup menu.
3. On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
4. Press F10 to Save and    Exit.
5. Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
6. Follow the prompts to restart your computer.

Hope this helps! Keep me posted for further assistance.
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 bottom right to say “Thanks” for helping!

[JamesUp]

I would like to thank you for your advice, kind sir.

First, I would like to answer your questions:

1. I have no clue whether an update happened or not, I noticed the issue when I woke up in the morning, so if it did, I was asleep.

2. I, also, don't know. I bought the Laptop from a pawn shop about a month ago, but when I received it, the laptop had several necessary settings admin locked. So, I decided to bring it back, and they said they can fix it. When I got it back, everything on it had been completely wiped, including all the main apps. That is the only change, that I know of, that has been done to it.

Next, what happened when I used your methods:

Hard reset: Absolutely nothing changed for what I noticed.

 "BIOS default" : When I repeatedly pressed the F10 key, nothing popped up, but the f12 key did a fast blink, followed a couple seconds later by the long blink (I don't know if the long blink is related to the fast one).

I hope this reaches you, sir, and I hope you have a new idea.

Kind regards,

James

[Echo_Lake]

@JamesUp

Thank you for posting back. 

I appreciate your efforts to try and resolve the issue. If you have already performed the steps from the document HP Notebook PCs - Computer Does Not Start: https://support.hp.com/in-en/document/c01997899, No Power or no Boot and the issue persists, it could be a hardware failure. 

I'm sending out a private message to assist you with the next course of action. Please check your Private message icon on the upper right corner of your HP Community profile Next, to your profile Name, you should see a little blue envelope, please click on it or simply click on this link: https://h30434.www3.hp.com/t5/notes/privatenotespage
 

Hope this helps! Keep me posted for further assistance.
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 bottom right to say “Thanks” for helping!