1 empty cartridge, won't print at all

Had this exact problem after blowing some leaked toner out with an air compressor. Cleaning the 4 mirrors behind the cartridges fixed the problem!

None of the cartridges can be empty if you want to print.
Even if you only want to print black, just black you need to
replace the other three cartridges.
Yes color laser printing is expensive.

Regardless of whether you have printer set to print in black and white, these models will not function without usuable cartridges in all slots.

Yes the HP CLJ 2600n printer will stop printing when a toner cartridge registers as empty. The cartridges will have to be replaced or You could use the "overide out" option. This allows continued printing even though the supply registers as empty. Beware that diagnosing print quality problems because of toner becomes more difficult.

Overide Out
To change this go to the PRINT QUALITY menu then REPLACE SUPPLIES and change the setting from "stop at out" to "overide out".

There is an override sequence and it works well. Press the select button (checkmark) to indicate Main menu. Press right-arrow (RA) to select System Setup. Press Select , then RA to Print Quality, Hit select. RA to Replace supplies and hit Select. Now, RA to Override Out and Select. Confirm with Select again. Your 2600n will now run even with an empty toner cartridge.

after replacing toner reset the count.

yes, it is normal
the newer printer has senser for ink cartridge. printer will not print if any of the ink cartridge is empty.
therefore, you need to replace the emply ink cartridge in order to print.

the problem is cyan and yellow toner are low, u will change the cyan and yellow it will be cleared otherwise the will be empty u can't print any thing suppose one will empty other cartridge will not work

Print a Supplies Status page to see the actual pages printed...

To print the Supplies Status page from the printer, on the printer control panel, select
Reports Menu, Supplies Status, and then Print Supplies Status page.

If the page count from the Supplies Status page indicates that the toner should not be in need of replacement then you have a bad cartridge. Actually, the cartridge is probably fine but the chip on the cartridge has got a problem. Return the cartridge to O.D. and get another one. Unfortunately, chips that don't work properly in not all that unusual so HP has a pretty easy return policy.

Hope this helps.

try another one , the chipset is probably faulty.