Printer print only black while all cartridges are

Hello
The color of HP LJ 2600n fades due to following reasons
1. the color cartridge near to empty 2. due to dust on reflection mirrors inside the printer
if the color cartridges are OK, then you need help of HP technician support, because cleaning of mirrors is very technical in nature for 2600n.
Dusty Environments can lead to Laser Scanner Contamination. The dust layer on the mirrors prevents proper transmission of the laser output in the imaging system leading to faded colors on the printed page. The initial stages of this failure typically occur in the magenta or yellow color planes as faded or light color. Often the left side is more faded than the middle.
You may need to contact the nearest Authorized Service Tech and get teh Laser Scanner replaced with the new released service part that has a mirror in a location where the dust ideally cannot reach easily.
Also, please ensure that the printer is relocated from the current location to a more dust free zone.
Hope this helps, if so do rate the solution

Have you tried a new Black toner cartridge?

just replace black toner cartridge mate :) and all will be OK :)

the problem is due to scanner mirror dust.you have to clean the scanner mirror.

select print black only from the print or page set-up.

I have two problems. Either it won't accept a print job or when it is printing it stops when it is going through the job intermittently. Like for an hour it won't continue then all of a sudden it prints one page then a half hour later another page etc. It is so frustrating.

just reset the printer to factory settings , use the menu to find factory settings .

if the test pages come out OK then the problem can not be the printer !!!!!!!
it must be from the application

A supply memory error is the smart chip on the cartridge. It can also be a physically damaged or locked / froze catridge. In this case the machine is identifying the black cartridge. The first thing to do is replace the cartridge (black).

If it's missing or has a corrupted smart chip lots of weird errors can result but they will usually still direct you to the specific cartridge to replace. If it's a refilled or remanufactured cartridge I would HIGHLY suspect that is the issue.

To locate the smart chip to see if it has come loose, see the picture below:


It's the green little computer board in the picture. Make sure it hasn't come loose. Below is a close-up of the chip. If it is a remanufacture or refill it should look slightly different than shown in the picture as the picture shows an original HP chip. If it's the exact same and a refill, return the cartridge to your supplier.


Hope this helps you. If so hit it with a FIXYA. If not, try to get the printer to print a configuration page or error report and let me know the last couple errors shown by numbers. (Full numbers, like 10.10.1000 or 13.02.05.)

Cheers

Hey I have 1 problem I have the printer of 2600n when i give print Command of RED Colour its come orange and right side i get light print and left side i get little dark print , what is the problem i don't understand any can help me . Thank u Morgan.M