Question about HP OfficeJet Pro k550 Printer

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Yellow Light on HP K550 indicating open panel will not turn off.

I have tried to unplugging the printer from the power for several minutes and have resecured every panel but the yellow light will not turn off. In fact, the printer makes no sound at all and of course it will not print.

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  • Reed1 Feb 01, 2009

    My solution was to buy an HP K5400 printer for $75 which
    replaced the K550. It works MUCH better than the K550
    and I could even use my old ink carts and print heads.


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Cartridge out of ink wont print K550. I reinserted the cartridge unplugged the power, it ran through cycles then it ran 1 paper blank then ran OK. Worked for me. Out of ink worked OK still but still shows out off ink but works mult. prints too fine. I refill my cartridges.

Posted on Feb 01, 2009

If the printer is connected to your computer - check to see if there is a blinking Red exclamation point / printer icon in the system tray. Sometimes mousing over this icon to see the tooltip is the only way to figure out what error message the printer is trying to tell you.

For us - when this happens, the printer is complaining about an "incompatible" ink cartridge - even though 99% of the time it will print from that cartridge without problems. So try removing and re-inserting all of your ink cartridges too.

Posted on Oct 07, 2008

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Error 79;04 comes up saying the power is off. We have tried turning the power off for several minutes but when we put it back on have the same problem.

Unplug any USB or network cables from the printer and try to power cycle. This error indicates a problem with the firmware on the printer and if it restarts without any cables attached there is a chance that you will be able to download the newest firmware to the printer. If it restarts, clear any print jobs from the queue and then reconnect the communication cable. Then down load the current firmware from HP and install it. This should solve the problem.

Jun 21, 2011 | HP DesignJet 500 InkJet Printer

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Ive replaced the ink cartridge in my printer and the orange light is still flashing. Ive taken it out and put it back in several times and nothing! HP DeskJet 920C


Check the rear access door, as well as if the top cover is being securely closed, make sure there are no paper jams and that the carriage is not 'stuck'...Press the RESUME button and see that the paper feeds, the carriage should move.

As a Tech, I also open the top cover, unplug the power cord, wait a minute (YES, 60 seconds) and Plug it back in. If the PRINT CARTRIDGE LIGHT continues to blink, open the cover on top again, making the cradle move and then stop.. Locate the yellow arrow and do as it indicates (It will point to a drawing of a cartridge that represents a symptom-perform the task associated with the symptom) other than that, remove and replace it it, making sure it firmly seats. As a last resort, return the cartridge and see if a New one fixes the problem. If these steps are unsuccessful, HP servicing is probably needed.

Hope this helps, Good Luck!

Nov 28, 2010 | HP DeskJet 920c InkJet Printer

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Ink cartridge installed but cartridge light continues to blink

Have you only replaced the magenta cartridge, or have you also tried the print head. A bad print head can cause the ink to read as empty or clogged.


Mar 15, 2010 | HP OfficeJet Pro k550 Printer

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My machine is hp officejet pro K850

Sometimes when you unplug devices for 5 to 10 minutes the memory resets. This my help if not let me know.

Dec 14, 2009 | HP OfficeJet Pro k550 Printer

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There's an option to reset the HP K550 via the buttons on the printer. You have to unplug the printer and press the buttons, but I don't know wich. Do you have a solution. Thank you Willy

A semi-full reset will do the following:
The user settings to the factory defaults, Language and country settings on some models, Fax logs, Fax headers, Fax speed dial information.

Reset the All-in-One to the factory default settings by using these instructions:

1. Unplug the power cable from printer when the printer is powered on and wait for 20 seconds.

2. Then, press and hold # and 6 while plugging in the power cord.

Continue holding until it displays Semi Full Reset message in the front panel of the All-in-One.

Sep 29, 2009 | HP OfficeJet Pro k550 Printer

3 Answers

How do I clean the printer heads for the HP K550

1. Remove printhead for offending color.
2. Soak printhead area in 1/4" of warm water for about one minute.
3. With a dry paper towel lightly wipe the printhead length wise.
You should get two continuous color bands either black/yellow
or cyan/magenta.
4. Repeat steps 2 & 3 until you get two continuous color bands.
5. Replace printhead in printer print several blocks of each color.
6. Repeat from step 1 until it works.
7. all else replace printhead.

Jan 13, 2009 | HP OfficeJet Pro k550 Printer

1 Answer

Will not do anything

You probably have a "door" sensor indicating it's open..

The doors to check are:
- cartridge bay door
- rear duplexer or back panel (is it in place?)
- top hinged flap.

Jan 06, 2009 | HP OfficeJet Pro k550 Printer

1 Answer

My printer stop working the power and the feed paper stay ON

Open the back panel of the printer and resit it into position.......check to see jams....

if this doesn't help
follow the steps in the link below

keep me posted


Nov 14, 2008 | HP OfficeJet Pro k550 Printer

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Xerox 8200 will not boot

If it takes a long time to cycle, then shuts down. I suspect the drum heaters are defective.
Best way to find that out is, turn off yout room lights, then turn the machine on.
There is a fan exaust on the right side of the printer where there are sloted openings.
When you turn the machine, look in that fan slot and see if you see lights inside the printer. There should be a candesent type of glow you see about 20 seconds to a minute after you turn on the machine. Leave it on for a couple of minutes, but if you see no lights the heater or heaters are bad. They are standard 120 volt 150 watt halogen lamps. Tricky to change. But it can be done.

Dec 28, 2007 | Xerox 8200/DP Thermal Printer

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