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info TP Link
Status LEDs off during Power Schedule period
The LEDs turn off when the power schedule mode is active.
? What Causes This
Power scheduling has been enabled to control operational hours of the device.
ⓘ What This Means
Visit http://tplinkrepeater.net and disable Power Schedule under Settings > Advanced Settings.
Source: page 30 of the official manual
From the manual
This error code appears in:
TP Link TL Wa850re 300mbps Wifi Range Extender