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info TP Link
Status RE LED On/Off status check
The RE (Repeat Extender) LED on the extender shows its connection state with the host router.
? What Causes This
Indicates that the device’s base operational connectivity has been established correctly.
ⓘ What This Means
None required.
Source: page 6 of the official manual
From the manual
This error code appears in:
TP Link TL Wa850re 300mbps Wifi Range Extender