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Black screen with beeping on start

Microsoft Windows 10 (64-bit)

My 15-af155sa displays a black screen with a blinking caps lock and 3initial

beeps and two final beeps

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Black screen with beeping on start



Thank you for posting your query on HP Community,


Let's start off by performing a Hard reset on the notebook

Before power resetting your computer, do the following:

  1. Disconnect or remove all peripheral devices. Start up the laptop and test the computer by itself, and then reconnect one peripheral device at a time.

  2. Turn over the computer and look for a battery compartment door.

For starters please try to roll back the bios from this link:

Please try both the steps mentioned in the link.


If this does not do the trick, please try all the steps from this link: HP Notebook PCs - Computer Does Not Start (Windows 10)


Alternatively, you can also go through this support document: If the LEDs blink, or the computer beeps, but it does not start, go to HP Notebook PCs - Troubleshooting LED Blink Codes or Beep Codes During Startup or Boot


Please try these steps here and let me know how it goes for further assistance!


That said, If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution and Kudos buttons, that'll help us and others see that we've got the answers!

Have a great day!

I am an HP Employee

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