HP OfficeJet Pro K550 User Manual

							6.Uninstall the printer software completely, and then reinstall the software. See Uninstalling the
printer software.
Check the signal strength
▲Check the signal strength indicated on the network configuration page of the printer (see
Understanding the configuration page). If the value is 0, the wireless devices (such as the
computer, the hub, or the wireless router) might be too far away, or the wireless signal might be
blocked.
If possible, bring the devices closer, or move the devices to avoid any obstructions or partitions.
See also 
Guidelines for reducing interference on a wireless network.
Check the printer lights
●If the Configuration Page light keeps blinking, the device might be faulty.
●If the Configuration Page light does not light up, check the network status and connection type
information on the network configuration page of the printer. If the information shows Offline and
Wired, the printer is connected to the wired network.
Disconnect the network cable and configure the printer for wireless communication.
NOTEThe printer operates in either a wired or a wireless mode at any given point of
time; it will not print in both modes simultaneously.
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							Clearing jams
To clear a jam
1.Remove all media from the output tray.
2.Check the rear access panel or the duplex unit.
a.Push the button on either side of the rear access panel or the duplex unit, and remove the
panel or unit.
b.Locate any jammed media inside the printer, grasp it with both hands and pull it towards you.
c.If the jam is not there, push the latch on the top of the duplex unit and lower its cover. If the
jam is inside, carefully remove it. Close the cover.
d.Reinsert the rear access panel or the duplex unit into the printer.
3.If you cannot locate the jam, lift the output tray and check for a jam in tray 1. If media is jammed
in the tray, do the following:
a.Pull out tray 1.
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							b.Pull the paper towards you.
c.Reinsert the tray and lower the output tray.
4.If you have not found the jam and have tray 2 installed, pull out the tray and remove the jammed
media, if possible. If not, do the following:
a.Ensure the printer is turned off and disconnect the power cord.
b.Lift the printer off tray 2.
c.Remove the jammed media from the bottom of the printer or from tray 2.
d.Reposition the printer on top of tray 2.
5.Open the top cover. If there is paper remaining inside the printer, ensure the carriage has moved
to the right of the printer, free any paper scraps or wrinkled media, and pull the media towards
you through the top of the printer.
WARNING!Do not reach into the printer when the printer is on and the carriage is stuck.
When you open the top cover, the carriage should return to its position on the right side of
the printer. If it does not move to the right, turn off the printer before you remove any jam.
6.After clearing the jam, close all covers, turn on the printer (if you turned it off) and resend the
print job.
If you encounter frequent jams, perform paper feed test to ensure that the paper path of the trays or
duplex unit is clear. This process will print 20 blank pages.
To perform paper feed test
●Embedded Web server: Click the Settings tab, click Printer Services in the left pane, select
the option to test paper feed from the drop-down list in the Print Quality section, and click Apply.
●Printer driver (Windows): Click the Services tab. For Windows 2000, Windows XP, and
Windows Server 2003, click the Service this Device button (this option is available only if the
Toolbox is installed), and then click the Printer Services tab. Click Test Paper Feed and follow
the onscreen instructions.
●Toolbox (Windows): Click the Printer Services tab, and then click Test Paper Feed and follow
the onscreen instructions.
●HP Printer Utility (Mac OS): Click Test Paper Feed from the Information and Support panel.
ENWWClearing jams 55
 
						

							To avoid jams
●Make sure that nothing is blocking the paper path.
●Do not overload the trays. See 
Understanding specifications for supported media.
●Load paper properly. See 
Loading media.
●When reinserting a tray into the printer, do so gently. Forceful insertion with a full stack of paper
may cause sheets to slide up within the printer, causing the printer to jam or pick multiple sheets
at one time.
●Do not use media that is curled or crumpled.
●Always use media that conforms with specifications. See 
Selecting print media.
●Make sure the output tray is not overly full when you send a job to print.
●Make sure media is aligned against the right side of a tray.
●Make sure the media length and width guides are adjusted snugly against the media, but do not
crinkle or bend it.
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							5
Printer lights reference
The printer lights indicate printer status and are useful for diagnosing printing problems. This section
contains information about the printer lights, what they indicate, and what action to take if necessary.
●
Interpreting control panel lights
●
Interpreting network connector lights
ENWW57
 
						

							Interpreting control panel lights
1Power button and light
2Configuration Page button 
 HP Officejet Pro K550dtn 
 HP Officejet Pro K550dtwn
3Cancel button
4Resume button and light
5 Printhead lights
6 Ink cartridge lights
For more information, visit HP website (www.hp.com/support/officejetprok550) for the latest
troubleshooting information, or product fixes and updates.
Light description /Light pattern Explanation and recommended action
All lights are off. The printer is off.
●Connect the power cable.
●
Press 
 (Power button).
The Power light is on. 
The printer is ready.
▲No action is required.
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							Light description /Light pattern Explanation and recommended action
The Power light blinks. The printer is turning on or off, or is processing a print job.
▲No action is required.
The printer is pausing for the ink to dry.
▲Wait for the ink to dry.
The Power light and the Resume light blink. Print media is jammed in the printer.
▲Remove all media from the output tray. Locate and
clear the jam. See 
Clearing jams.
The printer carriage has stalled.
●Open the top cover and remove any obstructions
(such as jammed media).
●
Press 
 (Resume button) to continue printing.
●If the error persists, turn the printer off, and then on
again.
The Power light is on and the Resume light blinks. The printer is out of paper.
▲
Load paper and press 
 (Resume button).
The printer is in manual duplex mode. It is waiting for the
ink to dry so that the pages can be flipped over and
reloaded.
▲Reload the stack of media into the printer, and press
 (Resume button).
The Power light and the Resume light are on. 
A cover is not closed completely.
▲Make sure all covers are completely closed.
The rear access panel or duplex unit is missing, or is not
inserted completely.
▲Make sure the rear access panel (HP Officejet Pro
K550) or the duplex unit (HP Officejet Pro K550dtn/
K550dtwn) is inserted completely at the back of the
printer.
ENWW Interpreting control panel lights 59
 
						

							Light description /Light pattern Explanation and recommended action
The Power light and the Resume light blink, and one or
more of the ink cartridge lights are on. One or more of the ink cartridges have expired.
CAUTIONPrinter services or repairs required
as a result of using expired ink cartridges will not
be covered under warranty.
●Replace the ink cartridge indicated.
●If you choose to use the expired ink cartridge, press
and hold 
 (Power button), and press  (Resume
button) three times. All lights except the Power light
go off. Damage that results to the printer from using
this cartridge is not covered under the warranty.
The Power light is on, and one or more of the printhead
lights blink.
 
One or more of the printheads are missing.
●Install the printhead indicated, and then try to print.
●If the error persists, replace the printhead indicated.
The Power light, and one or more of the printhead lights
blink. One or more of the printheads are faulty or need attention.
●Ensure the printhead indicated is properly installed,
and then try to print. Remove and reinsert the
printhead if necessary.
●If the error persists, replace the printhead indicated.
The Power light is on, and one or more of the ink cartridge
lights blink. One or more of the ink cartridges are missing.
●Install the ink cartridge indicated, and then try to print.
●If the error persists, replace the ink cartridge indicated.
One or more of the ink cartridges are out of ink and must
be replaced before you can continue printing.
▲Replace the ink cartridge indicated.
The Power light, and one or more of the ink cartridge
lights blink. 
One or more of the ink cartridges are faulty or need
attention.
●Ensure the ink cartridge indicated is properly
installed, and then try to print.
●If the error persists, replace the ink cartridge indicated.
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							Light description /Light pattern Explanation and recommended action
The Power light is on, and one or more of the ink cartridge
lights are on.
The Power light blinks, and one or more of the ink
cartridge lights are on.
 One or more of the ink cartridges are low on ink and will
need to be replaced soon.
▲Get ready new ink cartridges and replace the existing
cartridges when they become empty.
The Configuration Page light blinks.
(HP Officejet Pro K550dtwn) One of the following processes is taking place:
●The printer is initializing for wireless communication.
●If you are using SecureEasySetup (SES) to set up the
printer, the printer might be trying to connect to the
wireless network.
●
If you are using Windows Connect Now
TM to set up
the printer, the printer is receiving wireless
information from the USB flash drive.
Each of the above processes takes less than 2 minutes.
▲No action is required.
The Configuration Page light is on.
(HP Officejet Pro K550dtwn) The printer is in wireless communication mode.
▲No action is required.
All lights are on. 
A non-recoverable error has occurred. See All printerlights are on.
ENWW Interpreting control panel lights 61
 
						

							Interpreting network connector lights
1 Activity light
2 Network connector
3 Link light
NOTEThe printers wireless communication is turned off when the printer is connected using
a network cable.
Light description/Light pattern Explanation and recommended action
Link light is on. Activity light is off. The printer is connected to the network but is not
receiving or transmitting data over the network. The
printer is turned on and idle.
▲No action is required.
Link light is on. Activity light blinks. The printer is receiving or transmitting data over the
network.
▲No action is required.
 
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