HP Color LaserJet 8500dn - Error Code 54.2 Carousel Cycle Power is preventing me from printing. I recently changed the magenta toner and it clicked in normally, but the error code came up. The manual says to open the color toner clear door and look for an obstruction, I have and found nothing. It then says to power on and off, I have an no change. Any idea how to fix this problem?

54.06

Error message

54.06

Description

Color density sensor error

Action

1. Power cycle the printer.
2. Calibrate the printer. Click here to view the document "HP Color LaserJet 2600n - Calibrating the printer" available on the HP Web site at (http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00314525).
3. Change the Print Density settings through the HP Toolbox. Click here to view the document " HP Color LaserJet 2600n Printer - Change Device Print Settings in HP Toolbox" available on the HP Web site at (http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00310627).
4. If the problem continues, contact HP Customer Support Center for technical assistance athttp://www.hp.com/support/clj2600n or see the flyer that came in the printer box for additional contact information.

The main circuit board is faulty and needs to be replaced.

There is a problem with the carousel assembly.
Either it isn't rotating or the sensor is bad.
Power cycle the printer and see if the error resets.
Open the color toner door and look for an obstruction.
I'm doing this from memory...there is a carousel brake release at the top right of the open toner cover.
It is a slot. If you use a paperclip to push down in that slot, it will release the brake.
Power off the printer.
With the brake released, rotate the carousel. It should move freely.
If you have to, remove the toner one at a time. One of the cartridges could be the problem.
Good luck

Try HP Support

HP Color LaserJet 2840 All in One Printer Software and Drivers

Known problem with this machine the fan is located next to the magenta laser scanner at the base of the machine. this fan blows dust on to the scanner lenses and makes the prints light. Needs to be taken apart and cleaned. take it to a local service center if they know what they are doing should be less then an hour.

Not to sound like a smart aleck...do you have enough toner in it? Can you print a test page? Sounds like a toner issue to me.

You need to change the Magenta Toner. Rebuilt toners often have this kind of problems.

When installing new cartridges, it's always a great idea to perform a cleaning and recalibration of the machine. Below are the steps needed to do just such a task. You may want to print these out or save them somewhere for future reference as well. They are directly from the HP website.
Please rate the tip accordingly and thanks for using Fixya.com.
Cleaning the printer

1. Verify the printer is turned on and in the Ready state.
2. Open the HP Color LaserJet 2500 Toolbox. Click Cleaning Page on the Troubleshooting tab, and the click Print (HP Color LaserJet 1500 or 2500) or Cleaning Page (HP Color LaserJet 2550). A page with a pattern prints from the printer.
3. Remove any paper that may be in tray 1.
4. Remove the page that printed and load it face down into tray 1.
5. At the computer, press Clean .

Calibrating the printer There are two methods of calibrating the printer manual: at the printer or from the Toolbox on the computer. From the printer Turn the printer off and then on again. From the HP Color LaserJet 1500 or 2500 Toolbox on the computer

1. Open the HP Color LaserJet 1500 or 2500 Toolbox in one of the following ways:
   • Double-click the HP Color LaserJet 1500 or 2500 Toolbox icon on the computer desktop.
   • Select Start , Programs , HP Color LaserJet 2500 , and then HP Color LaserJet 1500 or 2500 Toolbox to open the Toolbox from the Windows desktop.
2. Click Diagnostic Tools on the left side of the screen on the Troubleshooting tab.
3. Click Color Calibration to perform the calibration procedure.

From the HP Color LaserJet 2550 Toolbox on the computer

1. Open the HP Color LaserJet 2550 Toolbox in one of the following ways:
   • Double-click the HP Color LaserJet 2550 Toolbox icon on the computer desktop.
   • Select Start , Programs , Hewlett-Packard HP Color LaserJet 2550 series , and then HP LaserJet Toolbox to open the Toolbox from the Windows desktop.
2. Click Print Quality Tools on the left side of the screen on the Troubleshooting tab.
3. Click the Calibrate Now button to perform the calibration procedure.

printer is ok, check the connecting cable and drivers.

Firstoff, if you have tray 1 set to "any size" & "any type" they had problems with it going into calibration to frequently. If you upgrade the firmware this will take care of that. As for no Cyan, check the scanner interlock to insure it is opening the scanner cover. You could also go into diagnostics and disable cartridge check and swap the cartridges around, ie. cyan & magenta, run the print quality pages and see if the problem follows the cartridge. It could also be HV power supply.