EnGenius EL-2511CD+ User Manual page 18

Figure 2-2-2
If you find the Yellow (?) sign on the adapter or the above message
5.
is not displayed, it shows the installation is not successful or the
wireless LAN PC Card is not operating properly. Uninstall and
re-install the driver, referring to Chapter 2-6 Uninstalling Driver and
Utility.
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