The machine control panel initially displays a message that the "controller is not connected" and the LED on the fiery displays AA after starting

i kindly recommend inspect the control board for any burnt components, damaged traces, or any signs of damage
a;so ,check all the connection between the control board,display unit, and control panel, display unit are secure.

The following lists the chain of events that occur when you turn on a printer. You can follow this list as one means of determining if the printer is operating correctly. The exact chain of events depends upon the last power down condition and where the printer has last determined the printhead is positioned, this is stored in non-volatile RAM. The Checklist is the primary reference for troubleshooting power-up problems.

1. Power cord is plugged in and the power switch is turned on:

2. Power supply senses AC line voltage conditions (110 VAC or 220 VAC)

and enables DC voltages. If an overload occurs, the printer turns off the high voltage DC supplies, causing a "blink" effect on the Control Panel LEDs.

3. BIST test flashes the PE LED very briefly at a fast rate until the end of the

next test.

4. The Boot loader performs CPU initialization and RAM test. It then sends

the boot loader version to the serial port.

5. Power-On Self Test (POST) initializes the Control Panel. The Control

Panel LED turns red, green, orange, and then off. The Control Panel LCD then goes black and then clear. The POST version displays on the LCD

and waits two seconds. During this time the operator can press the Back

button to bypass the remaining POST test.

6. Low level Power-On Self Test (POST) diagnostics are performed. The

Control Panel displays status messages as each sub-test is performed.

This test takes about 8 seconds. All LEDs are off during the test.

If POST diagnostics pass, the Control Panel displays the Xerox logo and turns on the green LED.

If the test detects an error, the error message displays on the LCD and the printer flashes the LEDs with a repeating error code pattern.

7. The VxWorks operating system is initialized and engine code is started.

This takes about 15 seconds. The Xerox logo is displayed.

8. Print Engine Self Test (PEST) diagnostics are then performed. These test

the heaters, clutches, motors and solenoids. As each clutch is tested, you hear clicking with four high tones as each motor is tested. This test takes about 30 seconds.

9. The printer now runs the mechanical initialization. The exact sequence
depends on the initial position of the printhead and wiper assembly.

The following lists the chain of events that occur when you turn on a printer.

You can follow this list as one means of determining if the printer is operating correctly. The exact chain of events depends upon the last power down condition and where the printer has last determined the printhead is positioned, this is stored in non-volatile RAM.

1. Power cord is plugged in and the power switch is turned on:

2. Power supply senses AC line voltage conditions (110 VAC or 220 VAC)

and enables DC voltages. If an overload occurs, the printer turns off the high voltage DC supplies, causing a "blink" effect on the Control Panel LEDs.

3. BIST test flashes the PE LED very briefly at a fast rate until the end of the

next test.

4. The Boot loader performs CPU initialization and RAM test. It then sends

the boot loader version to the serial port.

5. Power-On Self Test (POST) initializes the Control Panel. The Control

Panel LED turns red, green, orange, and then off. The Control Panel LCD then goes black and then clear. The POST version displays on the LCD and waits two seconds.

During this time the operator can press the Back button to bypass the remaining POST test.

6. Low level Power-On Self Test (POST) diagnostics are performed. The

Control Panel displays status messages as each sub-test is performed. This test takes about 8 seconds. All LEDs are off during the test. If POST diagnostics pass, the Control Panel displays the Xerox logo and turns on the green LED.

If the test detects an error, the error message displays on the LCD and the printer flashes the LEDs with a repeating error code pattern.

7. The VxWorks operating system is initialized and engine code is started.

This takes about 15 seconds. The Xerox logo is displayed.

8. Print Engine Self Test (PEST) diagnostics are then performed. These test

the heaters, clutches, motors and solenoids. As each clutch is tested, you hear clicking with four high tones as each motor is tested. This test takes about 30 seconds.

Turn off the HP LaserJet 2840.


Press and hold down the "Enter" and "*" keys on the printer's control panel, and turn the printer back on.


Hold the "Enter" and "*" keys until you see the "Permanent Storage Init" message on the device control panel. Release the two keys to perform the NVRAM initialization. The NVRAM initialization takes just a few seconds, and the "Permanent Storage Init" message remains on the printer's display until the initialization is complete.


Ensure that the "Ready" message on the printer's control panel is visible. You can now connect the printer to your computer and print your documents. If the "Ready" message is not displayed and your printer is still stuck in a loop, turn off the printer and contact HP customer support (see Resources).

• To reset an HP 2840 from your computer, open the HP Toolbox program, click "Device Settings," click "Service," click "Restore" in the Resets section and then click "OK" to confirm the action and restore the printer to its factory defaults.

No, but the fiery will just speed up your prints etc.. I have the c3380 and c5185, they are stand alone with no fiery. If you are buying this machine for office coping it will be fine. But remember! this is a Buisness Color machine. In my customer base the 80's have done well as long as you run them as an color machine and not the office black and white work hourse. The color prints are great without any help from fiery. Sales people will try to sell you all!!!!

HP 4015 NVRAM & hardrive initialization

Solution
A hard disk initialization will erase and reformat the printer's hard disk. Perform hard disk initialization only if an error code displays on the control panel indicating a disk error. Always try initializing the hard disk before replacing it.

1. Turn the printer on. 
2. As the printer performs its power-on sequence, press and hold the Menu button until all three lights on the control panel are lit. 
3. Press the back arrow . The message INITIALIZE DISK displays on the control panel. 
4. Press OK. The printer initializes the hard disk and continues the power-on sequence.


CAUTION: Initializing NVRAM resets the serial number, the model number, the event log, the page counts, and the EIO card. Use the SERVICE menu to restore the serial number and page counts. You also need to reconfigure any computers that print to this printer to recognize the printer. Initialize NVRAM only when absolutely necessary. In most situations, use a cold reset to return printer to factory defaults but still retain the needed values in the SERVICE menu. 

 NVRAM initialization
Before initializing NVRAM, print a configuration page and a supplies status page to gather the service menu values

1. Turn the printer on and watch the control panel display. 
2. When the display shows the memory count, press and hold the down arrow until all three lights on the control panel are lit
3. Press the up arrow . 
4. Press Menu . The message SKIP DISK LOAD displays on the control panel. 
5. Press the up arrow until NVRAM INIT is highlighted, and then press OK. The printer initializes NVRAM and then continues its power-on sequence.

daca aceasta procedura nu reuseste, atunci va trebui sa inlocuiesti formatter-ul. daca nu exista hard disk

Good luck

If you go into the Setup menu from CWS, and log in as the Administrator, you will see all of the scanning settings that you are able to manipulate. Also, this should be covered in your service contract with the company that sold you the machines.

Solution or Workaround:

1) TRY to flash the firmware.
2) Try cold reset and disk initializations.
3) Replace firmware dimm.
If you have a hard disk:
To resolve the issue it may be necessary to perform the Disk Init procedure.

Disk Init Procedure
1. Turn the printer off, then on
2. When the memory count starts on the control Panel, press and hold the Menu button until all 3 lights on the control panel are lid
3. Press the < button. The message “INITIALIZE DISK” appears in the display
4. Press the Check button. The printer will initialize the User space on the Compact flash and will continue it’s power-on sequence.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Fiery.. 
you would need to acess the fiery network controls from the touch panel. on the copier, reset up the ip address etc. reboot the fiery.
Fiery are a bit different from the standard acess to a nic card on a machine. Again I really am not familiar with Cannon. Thou I would recomenend searching for a Fiery set up manual, 

pls u check the fiery and dc12 printer cable. if u have another cable pls replace and chek that also. i think the problem is in only the connectres. u remove and clean all conctres and refix. maybe the problem solved.