Since 3 days laptop is showing "install an operating system" on and off

[Dr_Digvijay_27]

My laptop was showing screen flickers and frequent black out screen since 1 month. Now since 3 days my laptop is being crashed and showing blue box notice "boot device not found - please install an operating system on your hard disk". On and off laptop works for 30-40 min and shows same thing.

[zoey7886]

@Dr_Digvijay_27, Welcome to the HP Support Community!  

Thanks for reaching out about your query regarding Boot Issues! 

We're thrilled to have the opportunity to assist you and provide a solution.  

Check Hard Drive Connection:

• Turn off your laptop and remove the battery if possible.
• Open the back cover and ensure the hard drive is firmly connected.
• Reassemble the laptop and turn it on.

Run Hard Drive Diagnostics:

• Restart your laptop and during the boot process, press F2 or ESC to enter the BIOS/UEFI.
• Navigate to diagnostics tools and run the hard drive test.

Check Boot Order:

• Enter BIOS/UEFI setup by pressing F2, F10, or ESC during startup.
• Ensure that the hard drive is set as the primary boot device.

Reset BIOS/UEFI to Default Settings:

• Enter BIOS/UEFI setup again and choose the option to reset settings to default.

Check for System Recovery Options:

• Attempt to boot into the recovery partition by pressing F11 during startup.
• If it prompts you to reinstall Windows, follow the on-screen instructions.  

Hope this helps! 

Take care, and have an amazing day!  

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Regards,