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info TP Link
Status LEDs off during Night Mode period
The LEDs will dim or turn off automatically to reduce light pollution at night.
? What Causes This
Night mode has been activated in the settings, allowing control of when the status lights operate silently.
ⓘ What This Means
Visit http://tplinkrepeater.net and disable Night Mode under Settings > System Tools.
Source: page 29 of the official manual
From the manual
This error code appears in:
TP Link TL Wa850re 300mbps Wifi Range Extender