HP LASERJET PRO M351 - M451 – Calibration procedure – NVRAM Initialization – Error code and causes

Calibration Procedure
Calibration is a product function that optimizes print quality. If you experience any print-quality problems, calibrate the product.
1. Open HP ToolboxFX (HP Device Toolbox).

2. Click the System tab, and then click the Print Quality link.
3. In the area for Color Calibration, select the Calibrate Now check box.
4. Click Apply to calibrate the product immediately.

ERROR CODES

ERROR 10.0000 
Description
The memory chip for one of the print cartridges cannot be read or is missing.
# 10.0000 = black memory chip error
# 10.0001 = cyan memory chip error
# 10.0002 = magenta memory chip error
# 10.0003 = yellow memory chip error
# 10.1000 = black memory chip is missing
# 10.1001 = cyan memory chip is missing
# 10.1002 = magenta memory chip is missing
# 10.1003 = yellow memory chip is missing
Recommended action
Reinstall the print cartridge.
Turn the product off and then on.
If the problem is not solved, replace the print cartridge.

ERROR 49 
Description
The product experienced an internal error.

Recommended action
Turn the product off, wait at least 30 seconds, and then turn the product on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product power on.

ERROR 50.00 
Description
The product has experienced an error with the fuser.
Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
Turn off the product, wait at least 25 minutes, and then turn on the product.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product power on.
ERROR 51.00 
Description
The product has experienced an internal hardware error.
Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product on.

ERROR 55.0 
Description
The product has experienced an internal error.
Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product power on.
ERROR 57 
Description
The product has experienced a problem with its internal fan.
Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product power on.

ERROR 59.0 
Description
The product has experienced a problem with one of the motors.
Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product power on.
ERROR  79 
Description
The product has experienced an internal firmware error.

Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product power on.

ERROR 79 - Service Error 
Description
An incompatible DIMM is installed.
Recommended action
1. Turn the product power off.
2. Install a DIMM that the product supports.
3. Turn the product on.
NVRAM initialization procedure
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.

HP Color Laserjet printer – HP LASERJET PRO 100 – Control panel test – Factory reset – Calibration

Control-panel tests
The product includes diagnostic tests for the control panel.
Test the control-panel display
1. Press the Setup button.
2. Press the left arrow button, and then quickly press the Cancel button.
3. Press the Setup button to return to the main menus.
4. Open the Secondary service menu.
5. Open the Display test menu.
Test the control-panel buttons
1. Press the Setup button.
2. Press the left arrow button, and then quickly press the Cancel button.
3. Press the Setup button to return to the main menus.
4. Open the Secondary service menu.
5. Open the Button test menu.

Print a Diagnostics Page
If the printed output has colored shadows, blurry graphics, or areas that have poor color, you might need to calibrate the product to align the colors. Use the Diagnostics Page to check the color alignment.
1. Press the Setup button to open the menus.
2. Use the arrow buttons to scroll to the Reports menu, and then press the OK button.
3. Use the arrow buttons to scroll to the Diagnostics Page item, and then press the OK button to print the report.
4. If the blocks of color at the top and bottom corners of the page are not aligned with each other, calibrate the product.
Calibration

1.Press the Setup button to open the menus.

2.Use the arrow buttons to scroll to the System Setup menu, and then press the OK button.

3.Use the arrow buttons to scroll to the Print Quality menu, and then press the OK button.

4.Use the arrow buttons to scroll to the Calibrate Color item, and then press the OK button.

5.Use the arrow buttons to scroll to the Calibrate Now option, and then press the OK button.

Restore factory settings
Restoring the factory-set defaults returns most of the settings to the factory defaults. It will not reset the page count or tray size, but it might reset the language. To restore the product to the factory-default settings, follow these steps.
1. On the product control panel, press the Setup button.
2. Use the arrows buttons to select the Service menu, and then press the OK button.
3. Use the arrows buttons to select the Restore Defaults item, and then press the OK button.
The product automatically restarts.

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.
Uninstall and then reinstall the product software on the computers.
1. Turn the product off.
2. Press the right arrow button. Hold this button as you turn the product on.
3. When Permanent storage init. appears on the display, release the right arrow button.
When the product has finished the NVRAM initialization, it returns to the Ready state.