Hello @MaruthiKarthik,
Check "SQL Server Configuration Manager" for "SQL Server Network Configuration". Under "Protocols for Name", make sure that "TCP/IP" is enabled. Select "IP Addresses" Tab -and- Go to the last entry "IP All". Enter "TCP Port" 1433.
Now Restart "SQL Server .Name." from windows services. Check if it resolves the issue
Please mark as "Accept the answer" if the above steps helps you. Others with similar issues can also follow the solution as per your suggestion
Regards,
Manu