Hello Karthik_Pb,
Welcome to the HP Forums! I hope you enjoy your experience!
I understand that no sound is displayed. I will do my best to assist you with this! To troubleshoot the issue, please try the steps in this HP document to return sound to your computer: No Sound from the Speakers or Headphones (Windows 7)
These steps should be able to resolve the issue. If not, please provide the computer's model number. If you require assistance locating this information, please reference this website: Guide to finding your product number
Thanks for bringing this issue to the HP Forums. Have a great day!
Mario