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So, my laptop is a month and a half old. However, my computer won't allow me to boot it up. What's w

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Pavilion Laptop 15-cs3xxx
Microsoft Windows 10 (64-bit)

Boot device not found? I can give more info.

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@Pcfinder77_-, Welcome to HP Support Community!


Use HP PC Hardware Diagnostics even if the computer does not open to Windows. Start with the Quick Test (2 to 3 minutes). If the Quick Test does not find a problem, run the Extensive Test (2 hours or more). The Extensive Test includes a Loop Until Error option.


  1. Plug the AC adapter into the computer.

  2. Press the Power button for at least five seconds to turn off the computer.

  3. Turn on the computer and start pressing Esc repeatedly, about once every second. When the menu appears, press the F2 key.
  4. When the HP PC Hardware Diagnostics menu displays, click Component Tests.

    HP PC Hardware Diagnostic UEFI screen

  5. In the Component Tests menu, click Hard Drive, and then click Quick Test.

  6. Click Run once.

    Running the Hard Drive Quick Test

  7. The Hard Drive Quick Test begins. If the computer has more than one hard drive, select the drive you want to test. To test all the hard drives, select Test All Hard Drives.

    When the test is complete, the screen displays the results. Test results are also available in the Test Logs on the main menu.

  8. If the hard drive passes the Quick Test, but a there is still a problem with the hard drive, run the Extensive Test. This test includes the SMART Check, Short DST, Optimized DST, and Long DST. To run these tests individually, select them from the Hard Drive Tests menu.

    If the hard drive fails a test, write down the failure ID (24-digit code) for when you contact HP Customer Support. The information is also available in Test Logs on the main menu.

If the test passes but the error message continues to display, proceed to the next step.

If the Hard Drive Test displays an error message and a warranty ID code, contact HP.

The customer service agent will ask you for the 24-digit code if they need to setup a repair or replace the hard drive.


For further steps, follow the document


Hope this helps! Keep me posted. 


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