Officejet Pro K550 Driver Failure in 10.6.8 & 10.7.4

[rlindenschmidt]

A coworker's HP Officejet Pro K550 has stopped printing.  Initially the error codes from the front panel indicated a paper jam.  After disassembly (which is NOT easy btw) and a complete cleaning, the printer still refuses to function.  I can print test pages all day long by holding the Resume button on the front panel of the printer.  However, once I send a page to the printer from Microsoft Word, Preview, or any other program, the printer seizes and both the Power and Resume button flash as if there is a  paper jam.  There is none as no paper comes out.  Curiously, if I use a Generic PCL Printer driver instead of the HP Officejet Pro K550 driver, I can print in black and white just fine.  I've tested this on laptops running 10.6.8 and 10.7.4 with the same results.  I've reset the printing system on both machines with the same results.  I'm officially out of ideas.  Can anyone think of what's going on?

[-JohnB-]

Hi there,

This firmware update for the printer should resolve the issue you are experiencing. Give the update a shot and let us know if it helps.

Best of Luck!

[hp-ist-doof]

hi there,

i get the exactly same error,

i can also print by Generic PLC driver,

or output a config test page by holding power and pressing red X once on the printer.

but i always get "drucker ist belegt" which means "printer is in use" error when i try hps mac osx K550 10.7 driver !

everything works (hp utility tools to calibrate etc. stuff) except for printing from whatever application i use

what the hell is happening here? and how can i get full funtionality back?

i already have Firmware version 20061019 SPP0013H which seems like the only one i could download-

but, although i would possibly need this firmware update-

there is no way to install the firmware update,

since clever people of HP decided not to leave a tool for osx lion users,

the manual for doing firmware updates is only written for 10.4.8 users (maybe half a dozen years ago?!)

i cant find a update firmware option anywhere although i see a firmwareupdate.task plugin which seems to be for hp printer utility.... but i cant use it sensefully ....

what are you up to? making me crazy? making people buy new stuff?

is there any solution in sight? 

[hp-ist-doof]

now i found the firmware update option via option key + f key + d key

but that firmware update didnt solve ANYTHING

by the way

the yellow ink cartridge is nearly empty,

BUT on all test printings there are no  problems regarding yellow color

so what?! is this just to make me buy your stinking ink?

i want a working printer right now and that was your job guys !