Lexmark 4800 Series - Manual (Page 106)

For more information, see the computer documentation.
Solving printer communication problems
The printer and the computer cannot exchange data.
These are possible solutions. Try one or more of the following:
Establish bidirectional communication between the printer and the computer
For more information, see “Bidirectional communication is not established” on page 135.
Make sure the printer is not in sleep mode
If the power light is blinking on and off slowly, the printer is in sleep mode.
1 Unplug the power cable from the wall outlet.
2 Wait ten seconds, and then insert the power cable into the wall outlet.
3 Press to turn the printer on.
Wireless troubleshooting
How do I find out what type of security my network is using?
You must know the security key and security mode in order to properly set up the printer for use on the wireless
network. To obtain this information, see the documentation that came with your wireless router, see the Web page
associated with the router, or consult the person who set up your wireless network.
Check your security keys
A security key is like a password. All devices on the same network share the same security key.
Note: Make sure you copy down the security key exactly, including any capital letters, and store it in a safe place
for future reference.
The security key must follow the following criteria.
WEP key
• Exactly 10 or 26 hexadecimal characters. Hexadecimal characters are A–F and 0–9.
• Exactly 5 or 13 ASCII characters. ASCII characters are letters, numbers, and symbols found on a keyboard.
WPA-PSK or WPA2-PSK key
• Up to 64 hexadecimal characters. Hexadecimal characters are A–F and 0–9.
• Between 8 and 64 ASCII characters. ASCII characters are letters, numbers, and symbols found on a keyboard.
Printer is configured correctly, but cannot be found on the network
Make sure:
• The printer has power and the light is on.
• The printer is within range of the wireless network.
• The printer is located away from other electronic devices that may interfere with the wireless signal.
• Your wireless network is using a unique network name (SSID). If not, it is possible that the printer/print server
is communicating over a different, nearby network that uses the same network name.
• The printer has a valid IP address on the network.
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