black screen after power on

[Sohamkol2007]

Yesterday my laptop asked for bit locker recovery key. the same was provided and system went for repair. after 12 hours same status was showing and laptop was powered off. After that when i m switching my laptop black screen is coming. No movement. pls suggest

[Elohi_NR]

Hi @Sohamkol2007,

Welcome to the HP Support Community. 

I'd be glad to help you! 

I understand that you are having issues with the black screen.

CAUTION:

If your computer does not turn on, wait at least 5 minutes before troubleshooting the computer. Your computer might be installing an update for Windows or the BIOS or detecting new hardware. During this update process, you can expect the screen to be blank for several minutes. It might damage the computer if this process is interrupted. Do not turn off or unplug the computer during the update process.

Perform a hard reset

If your computer suddenly fails to boot properly, perform a hard reset (power reset).

For detailed instructions on resetting your computer, see HP PCs - How to Power Reset Your Computer.

• Turn off the computer.
• Disconnect the AC adapter.
• Remove any discs from the disc drive.
• Remove memory cards from the card reader slot.
• Disconnect all nonessential peripheral devices, such as printers, scanners, external hard drives, and USB flash drives.
• With the AC adapter unplugged, press and hold the power button for approximately 15 seconds.
• Reconnect the AC adapter, and then turn on the computer.

Note: If an error message is displayed, see Troubleshooting Error Messages on a Black Screen During Startup or Boot.

Otherwise, continue with the troubleshooting procedures in this document.

Click here for the remaining steps. 

Hope this helps! Keep me posted for further assistance

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.