LaserJet 3600n Printer: my HP LaserJet 3600 displays status READY yet my p...

Probably a DC Controller problem.
Have a tech check it out.

Use service mode to skip calibration on startup. Then perform quick calibration when ready.

Hi,

Are you able to print test page from Printer ?
This will help us diagnose and isolate the issue further
To print self test page ( Demo page ), do these steps below

Press the right arrow button simultaneously. It should start printing the demo page.
If this works fine, this could possibly be an issue related to print jobs stuck in queue.

To clear print job stuck in Queue
Click on Start button
Click on Control panel
Click on Printers and Faxes
Check for HP Laserjet Printer icon
Right click on the printer icon and Click Cancel all documents
Once you have done the above step, disconnect the printer from PC ( if using usb ) or turn printer off

Restart your PC/laptop
Check under printers and faxes folder if the Printer status shows Ready and 0
You are ready to print

if you go into the printer menu you will find that it can be set to calibrate at diffirent times. eg start up

if you have used another printer on the same port # or local port. plug the cable into the 3600 and refresh the port. if its an ethernet port print th io sheet and make sure its holding its settings.

This is a known issue with 'host-based' printers like the 3600. You need the PCL5 driver, which this printer will not work with. You need a different printer, such as the HP 3520.

This page will explain it all.

We found that we had a defective cartridge. We returned it. A replacement cartridge did not cause the printer to callibrate continuously.

Error 51.23 on HP 3600 color laserjet printer