Configuring the optional internal wireless print server
If you purchased the optional internal wireless print server after your printer was already set up, follow these steps:
1 Install the internal wireless print server into the printer. For more information, see "Installing an optional internal
wireless print server" in the "Setting up the printer" chapter.
2 Click Start Programs or All Programs Lexmark 3500-4500 Series.
3 Click Wireless Setup.
4 Click Start.
5 Follow the instructions on the computer screen.
6 Click Finish to complete the installation.
Also here is the link to the setup guide and user manual
click here
configuring the wireless is in the setup guide
You can reset the Wireless Network Adapter of your Lexmark X3550 by pressing Settings (on the printer operator panel) > Network Setup, hit check > Wireless Setup, hit check > Reset Network Adapter to Defaults, hit check > Yes, hit check. The WiFi light on the printer should turn on solid orange after a few seconds. Then, you can run the Lexmark Wireless Setup Utility/ Wireless Configuration Utility to configure the printer for wireless connection. If you need further assistance in setting up your printer for wireless connection, feel free to contact Lexmark technical support. Thanks.
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