This WiFi indicator light pattern is primarily the result of incorrect wireless and security settings between the printer and access point (wireless router).

Look at all the possible reasons why a blinking orange light might appear, and follow the Diagnosis Steps.
The sequence is not fixed, as there are several reasons why the printer may lose communication with the access point or router.

Reason	Possible Diagnosis Steps	Article Links
1.  Wireless/Security setting misconfiguration	The following should be performed:  Print a network settings page. Open the wireless router's web page and view the WiFi/Security settings. HINT:  You need to obtain the following from your wireless router's User's Guide or Installation documentation: 1.  IP address (i.e. 192.168.#.#) 2.  User name and login password 3.  Location of wireless and security settings. Shortcut:  If you know your router user name/login, you can optionally perform an ipconfig on your computer to obtain the router's IP address.  The listed gateway address is often the router's IP address. Alternatively, just think of the gateway as the IP address of the router.   KEY STEP!  Compare the following values and ensure that they are the same:   Printer's network setting page Wireless router's web page SSID=? SSID=?  BSS Type=?  Infrastructure or Ad hoc BSS Type=?  Infrastructure or Ad hoc Security Mode?  WEP,WPA, WPA2 Security Mode?    Security key=?  This value is only listed on the router.  Security key, password, passphrase? This value is case-sensitive.  If entered improperly during the original configuration, it is most likely the cause of the problem.  ... Wireless radio turned ON? IP address i.e. 192.168.0.101 IP address i.e 192.168.0.1 Netmask?  Infrastructure - 255.255.255.0 Ad hoc - 255.255.0.0   Netmask? Gateway address i.e. 192.168.0.1 NOTE:  This should be equal to the IP address of the router.   Gateway NOTE:  SSID and network keys are case-sensitive. Lastly, ping the printer's gateway address (also wireless router/AP's  IP address).  If your computer cannot contact the wireless router/access point, your printer will not be able to, either.  EXCEPTION: The computer is connected via Ethernet cable to the router;  in this case this solution step will prove less useful.	Print a network settings page.  Instructions vary by model: Model Instructions Z1420 Click here.   How to access the wireless router's web page.  Click here.  (example) How to perform an ipconfig. Click here.                                               How to ping IP and gateway addresses: click here. How to obtain computers IP parameters: click here.(Useful for Ad-hoc ) How to reconfigure printer using the Wireless Setup Utility: click here.
2.  Access point's radio is disabled or turned OFF.	Refer to the wireless router documentation, or look for the setting through the Access Point's web page.	See Wireless Routers web page.
3.  Access Point out of range.	Check signal strength by printing our a network settings page. This will be the Quality setting.	How to print the Network Settings Page: click here.
4.  Access Point has a hardware or software setting problem.	Check antenna(s), and look for the following through the AP's web page:  WEP, WPA, WPA2 security setting. DHCP disabled. MAC filtering enabled. AP power output decreased. Only available on certain APs.  Possible Radio Frequency (RF) interference  between AP and any other device which uses RF technology (e.g., other APs, cordless telephones, microwaves, etc.)  Hackers/Crackers have set up shop, and are creating havoc on your wireless network.     Push-button security on certain wireless routers/APs may have been recently turned ON.	See wireless router manufacturer's documentation, or contact router manufacturer.
5.  Attempting simultaneous USB and wireless connections.	Simultaneous connections are not supported.  If permanently switching over to a USB connection from a network connection, it's advised to reset the printer.	How to reset the printer: click here.
6.  Installing printer on new network, printer has old configuration settings.	Reset the printer, and follow the suggestions in the table. Scenario Action New Computer/New Network Reset and perform full installation from CD. Old Computer/New Network Reset and reconfigure printer using WSU.	Reset - See above How to reconfigure printer using the Wireless Setup Utility: click here. Windows XP/Vista Infrastructure (most common) Click here Ad hoc Click here Windows Users!  The light will not turn green until after you've removed the installation cable. Macintosh X.3 and X.4 Infrastructure (Most Common) Click here. Ad hoc Click here.
7.  Connected via USB, but USB cable has become disconnected.	Reseat cables on both printer and computer end.	No article.
8.  Access Point has reset back to factory defaults.	If you remembered to note the Wireless/Security values for the AP, re-enter them through the wireless router's web page.  Otherwise, reconfigure the new settings on the AP, reset the printer, and run the Wireless Setup Utility.	See wireless router manufacturer's documentation for setting up security, and use Wireless Setup Utility link above.
9.  Printer is handshaking with access point and negotiating configuration settings.	This is a temporary flashing state, and the light should turn green after configuration is complete.	No article.

• Wireless Glossary

Please contact Lexmark Technical Support for additional assistance.  NOTE:   When calling for support, you will need your printer model type and serial number.
Please call from the computer, access point and printer in case the technician asks you to perform a task involving one of the devices.