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79 Error
Turn off then on
The device has experienced an internal
firmware error.
Turn off the power by using the power
switch, wait at least 30 seconds, and then
turn on the power and wait for the device to
initialize.
If you have recently installed a memory
DIMM in the device, turn off the device,
remove the memory DIMM, reinstall the
DIMM to verify that it is seated properly,
and then turn on the device.
If a surge protector is being used, remove
it. Plug the device directly into the wall
socket. Use the power switch to turn the
device on.
If the error persists, upgrade the firmware.
See Updating or recovering the firmware
code.
If the error persists, replace the formatter.
See Removing the formatter assemblies
If
you need more help come back.
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/ thumbs / testimonial are welcome!
Cleaning the paper path
During the printing process, paper, toner and dust particles can accumulate inside the device. Over time, this buildup can cause print-quality problems such as toner specks or smearing. This device has a cleaning mode that can correct and prevent these types of problems.
To clean the paper path from HP Toolbox
Use HP Toolbox to clean the paper path.
NOTE:
This is the recommended cleaning method. However, if there is no access to HP Toolbox, use the method in To clean the paper path from the device control panel .
Make sure that the device is turned on and in the Ready state.
Open HP Toolbox.
On the Troubleshooting tab, click Troubleshooting Tools button on the left. Under the Cleaning Page header follow the directions to print a cleaning page.
At the device, remove any print media that might be in tray 1.
Remove the page that printed and load it face-down into tray 1.
At the computer, click Clean .
To clean the paper path from the device control panel
If there is no access to HP Toolbox, print and use a cleaning page from the device control panel.
Press MENU .
Use the (Left Arrow) or the > (Right Arrow) button to find the Service menu.
Press Enter .
Use the (Left Arrow) or the > (Right Arrow) button to find Cleaning Mode.
Press Enter .
Load plain letter or A4 paper when prompted.
Press Enter again to confirm and begin the cleaning process.A page feeds through the printer slowly. Discard the page when the process is completed.
To see more information on print quality problems. you can review this HP document:
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