!!
critical Tenda
Error Code red LED flashes 5 times
Connection failure to the Internet/ISP connection failure or misconfiguration.
? What Causes This
Faulty configuration or interrupted internet link/connection issues.
✓ How to Fix It
Check ISP connection, modem status; verify network settings from documentation/suggestions by technical support.
Source: page 15 of the official manual
From the manual
This error code appears in:
Tenda Ac1200 Wifi 6 Router