TP-Link TL-WN723N - TL-WN723 N LED Status Overview

TL-WN723N 150Mbps Mini Wireless N USB Adapte
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1.3 Hardware Overview
LED status:
Status Working Status
Off
The driver has not been installed;
The adapter's radio has been disabled.
Flashing Slowly
The driver has been installed but no data is being transmitted or
received.
Flashing Quickly Data is being transmitted or received.