HP color laser 2550L prints only in yellow

Hi Mmgrafde,

Press the Go and Rotate Carousel buttons simultaneously. This will calibrate the printer. See if this works.

Otherwise....Remove all cartridges and drum. Switch off printer. Close the lid. Switch on printer and wait until any churning stops. Insert the drum and close the lid. Wait until any churning stops. Put in one cartridge at a time, closing the lid and wait till it stops churning each time. With the last cartridge put in, it will churning longer (calibrating). Try to print from your computer.

It could also be that the toner could actually have run out for the other colors.

Rgds
S88