Welcome to the Dell Community @Samarthsinghal 

1. Restart your Dell PC.
2. When the Dell logo appears, press F12 key to enter One-time Boot Menu.
3. Use the arrow keys to select Diagnostics and press Enter key on the keyboard.
4. Follow the on-screen prompts and respond appropriately to complete the diagnostics.
   If the test fails, write down the error code and validation code.

Best regards,

U2