Having trouble signing into PlayStation Network on your PS3? Follow these steps:
Visit status.playstation.com for outage reports
Settings → System Update → Install any available updates
Settings → System Settings → System Information → Restore Default Settings (won't delete saves)
If you can sign in on phone/PC, the issue is PS3-specific
If nothing works, contact official support for advanced troubleshooting
Important: Ensure your PS3 isn't banned from PSN and avoid third-party sign-in tools.