How do I fix my PlayStation Network?

How do I fix my PlayStation Network?
How to Fix “PlayStation Network Sign In Failed”?

Reset Your PSN Credentials and Try Again.
Enable Automatic Login.
Update Your PlayStation Manually.
Change the DNS.
Rebuild the Database.

How to Fix “PlayStation Network Sign In Failed”?
  1. Reset Your PSN Credentials and Try Again.
  2. Enable Automatic Login.
  3. Update Your PlayStation Manually.
  4. Change the DNS.
  5. Rebuild the Database.