Hi oldmember91,

Please try the following steps to reset the Lock Panel Password on Dell 3130cn Color Laser Printer and Dell 5110cn Color Laser Printer:

Resetting the Default Panel Lock Password:

If you forget the panel lock password, this process recovers the factory default panel lock password of 0000.

1. Turn off the printer.
2. While holding Menu, turn on the printer.
3. Continue to hold Menu until the display indicates Ready to Init.
4. Release Menu and press Select button.
5. Press Left Arrow Key to select Yes, and then press Select button.

Clearing NVRAM

Wired Connection: To restore the default network settings for a hard-wired connection, take the following actions:

• Press the Menu button.
• Press the down arrow button until Admin Menu appears, and then press the right arrow or Select button. 
• Press the down arrow button until Wired Network is displayed. Press the right arrow or Select button.
• Press the down arrow button until Reset LAN appears, and then press the right arrow or Select button. 
• The Are you sure? message appears on the operator panel, press the Select button. 
• The display momentarily indicates Initializing... followed by Initialized followed by Restart Printer to apply setting. The display returns to Wired Network and Reset LAN. 
• Turn the printer off, wait a few moments, and then turn the printer on

Note: This restores network settings and the EWS password to factory default. The default username is admin and the password is blank (no password). 

Wireless Connection: 

To restore the default network settings for a wireless connection, take the following actions:

• Press the Menu button.
• Press the down arrow button until Admin Menu appears, and then press the right arrow or Select button. 
• Press the down arrow button until Wireless Net appears. Press the right arrow or Select button. 
• Press the down arrow button until Reset Wireless appears, and then press the right arrow or Select button. 
• The Are you sure? message appears on the operator panel, press the Select button. 
• The display momentarily indicates Initialized followed by Restart Printer to apply setting then returns to Wireless Net and Reset Wireless. 
• Turn the printer off, wait a few moments, and then turn the printer on. 

You may also refer to the Dell 3130cn Color Laser Printer manual at: http://bit.ly/Y1ZTzY 

You may also refer to the Dell 5110cn Color Laser Printer manual at: http://bit.ly/YceTfS 

Hope this helps. Please share the findings.