HP LaserJet 400 color M451dw asking password to login

[Rostam]

Hello,

I purchased HP LaserJet 400 color M451 dw. after two months all the menu of this device disabled and it is asking password to login. i have in a big trouble. can anyone please help me how to reset this. i attached you the print screen. Thanks:

[minecraft1]

unfortunately i did not find the answer

[Reskape]

Hello @Rostam

The problem its that if someone set up a password and you dont have it you cannot change anything on the printer 

The only way to go about this will be doing a reset to the printer to remove the password

NVRAM initialization
CAUTION: All HP Jetdirect settings are also reset. Be sure to print a configuration page before
performing an NVRAM initialization. Make note of the IP address that is listed on the Jetdirect
configuration page. You need to restore the IP address after performing an NVRAM initialization.
Performing an NVRAM initialization resets the following settings and information:
● All menu settings are reset to factory default values.
● All localization settings, including language and country/region, are reset.
After performing an NVRAM initialization, reconfigure any computers that print to this product so that
the computers can recognize the product.
Perform an NVRAM initialization
1. Turn the product off.
2. Simultaneously press the Right arrow button and the Cancel button. Keep these buttons
depressed as you turn the product on.
3. When Permanent storage init. appears on the display, release both buttons.
4. When the product has finished the NVRAM initialization, it returns to the Ready state.

There may be the need of performing a deeper reset in case this first one doesnt get the job done

The process will be almost the same but instead of holding the right arrow you will hold the left arrow