Can't turn on the computer

[Krishnakkk]

Power light is glowing but screen is black and mouse and keyboard not working ..

Key board and mouse work in other devices (laptop)

[Echo_Lake]

@Krishnakkk

Thank you for posting on the HP Support Community.

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

Before troubleshooting startup issues, remove or disconnect all discs and devices from the computer.

• Step 1: Remove discs and devices
• Step 2: Perform a hard reset
• Step 3: Run hardware diagnostic tests
• Step 4: Refresh or reset your PC. Click here: https://support.hp.com/in-en/document/c04718479 to complete the troubleshooting steps. By end of the article, you will be able to fix the issue.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.