HP OfficeJet Pro K550dtn 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...

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...

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,...

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...

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.
●...

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...

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...

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:...

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...