Blank screen and double beep

[Diminest]

When i start my laptop, nothing appears on screen and the caps lock button flashes and I hear a double beep .what could it be?

[A4Apollo]

Hey there! @Diminest, Thanks for stopping by the HP Support Forums!

I understand when you turn on your PC you see a black screen with caps lock blinking on it.

Don't worry I'll try to help you out.

Did you make any software or hardware changes on your laptop?

How many times does the light on the caps lock is blinking?

Are you able to boot into the BIOS page?

Have you tried checking with a different adapter?

Please share the product number of your PC to assist you better.

Excellent description and a great diagnosis done. It is greatly appreciated.

Please try the steps recommended below.

To perform a power reset on a laptop with a removable battery, use the following steps:

1. Turn off the computer.

2. Remove the computer from any port replicator or docking station.

3. Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.

4. Unplug the AC adapter from the computer.

5. Remove the battery from the battery compartment.

6. With the battery and power cord unplugged, press and hold the Power button for about 15 seconds to drain any residual electrical charge from the capacitors.

7. Insert the battery and plug the AC adapter back into the laptop, but do not connect any of the peripheral devices.

8. Press the Power button to turn on the computer.

   The computer starts normally or a startup menu opens.

      NOTE:

   If your computer does not start after pressing the Power button, then a power reset did not solved the startup issue. See Additional resources for further troubleshooting steps.

9. If a startup menu opens, use the arrow keys to select Start Windows Normally, and then press the Enter key.

10. After Windows opens, reconnect each peripheral device that was disconnected, one device at a time, until all devices are reconnected.

11. Your laptop has been reset. After a power reset, it is a good idea to run Windows Update and HP Support Assistant to update all device drivers. See Updating Drivers and Software with Windows Update (Windows 10, 😎 and Using HP Support Assistant (Windows 10, 8, 7) for more information.

Also, try the steps recommended below.

Turn off the notebook.
Plug the notebook into a power source using the power adapter.
With the notebook off, press and hold the Windows logo key and the B key at the same time.
   NOTE:
On some notebook models, it might be necessary to press and hold the Windows logo key and the V key.
While pressing those keys, press and hold the Power button on the computer for 2 to 3 seconds, and then release the Power button but continue to hold the Windows logo key and the B or V key until the HP BIOS update screen displays or you hear a beeping sound (usually 8 beeps).
The HP BIOS Update screen displays and the BIOS update begins automatically. This might take several minutes, and you might hear additional beeping sounds.
If the HP BIOS Update screen does not display, repeat the previous steps. If the issue persists after repeating the steps, skip to the next step to Download a replacement BIOS file.
If the Power light turns off, the notebook has turned off because the Power button was held too long. Repeat the previous steps, making sure to hold the Power button for 2 to 3 seconds only.
If your notebook starts Windows, update the BIOS to the latest version using the standard BIOS update procedure. For more information about updating your notebook BIOS, go to Updating the BIOS (Notebooks).
Click Continue Startup to prompt the notebook to restart immediately, or allow the notebook to restart automatically when the timer reaches zero.
After the notebook restarts, press Enter to continue.
   NOTE:
If the notebook repeatedly displays a message that the BIOS has been recovered, go to HP BIOS Application Selected is Corrupt or Missing for troubleshooting steps.
After Windows starts, if a message displays stating that the notebook was improperly shut down or that a boot problem was detected, follow the on-screen instructions.
You can now to enter the BIOS menu or start the Windows operating system.

If you are able to boot into BIOS try restoring the BIOS default and check if it helps.

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.

Refer this article to know more information about recovering BIOS. Click Here

Also, refer this article to know more about blink codes on your PC. Click Here

If the issue still persists after trying out the steps. It is a hardware issue with your PC. 

Let me know if this works!

I hope you have a great day! 🙂

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!

[Diminest]

Hi there! Thank you for helping me!

My laptop's serial number is 5CD51347T4.

It's a pavilion 17 - 1250nv.

I tried with different adapter but it does not work.

I can't see anything on the screen.

No I didn't do any changes in software or hardware.

 It is a double beep

[A4Apollo]

@Diminest, thanks for your quick response and time.

I appriciate your efforts for writing back to us.

Thanks for sharing the product details.

Did you try the steps recommended from my previous post?

Are you able to boot into BIOS on your PC?

If the caps lock is blinking two times on your PC.

The main area (DXE) of BIOS has become corrupted, and there is no recovery binary image available. (Also happens when updating the BIOS.)

You can try recovering the BIOS by following the steps recommended previously.

If the issue still persists after trying out the steps. The BIOS on your PC is corrupted and you have to get the PC serviced.

I will share you few details through a private message about the service options for your laptop.

Please watch your inbox for more information.

Hope this answers your query!

Take Care! 🙂

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!