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computer and then try to open the EWS again. If you can open the EWS, try using the
printer (for printing).
If you are able to open the EWS and use your printer with the firewall turned off, you need
to reconfigure your firewall settings to allow the computer and printer to communicate
with each other over the network. For more information, see
Configure your firewall
software to work with the printer.
If you are able to open the EWS, but are still unable to use the printer even with the firewall
turned off, try enabling the firewall software to recognize the printer. For more information,
see the documentation provided with your firewall software.
After resolving the problems
After you resolve any problems and have successfully connected the printer to your
wireless network, complete the following steps for your operating system:
Windows
1. On the computer desktop, click Start, select Programs or All Programs, click HP,
click the name fo the folder, and then click Printer Setup & Software.
- Or -
On the Start screen, click Printer Setup & Software.
2. Click Connect a new printer, and then select the type of connection you want to use.
Mac OS X
1. Open HP Utility. For more information, see
HP Utility (Mac OS X).
2. Click the Applications icon on the HP Utility toolbar, double-click HP Setup
Assistant, and then follow the onscreen instructions.
Configure your firewall software to work with the printer
A personal firewall, which is security software running on your computer, can block
network communication between your printer and your computer.
If you are having problems such as:
• Printer not found when installing HP software
• Unable to print, print job stuck in queue or printer goes offline
• Unable to see printer status on your computer
The firewall might be preventing your printer from notifying computers on your network
where it can be found.
If you are using the HP software on a computer running Windows and cannot find the
printer during installation (and you know the printer is on the network)—or if you have
already successfully installed HP software and experience problems—check the
following:
• If you have just installed the HP software, try turning off your computer and the printer,
and then turning them both on again.
• Keep your security software up to date. Many security software vendors provide
updates that correct known issues and provide the latest defenses against new
security threats.
Chapter 5
72 Solve a problem
- HP Officejet Pro 251dw 3
- Copyright information 4
- Hewlett-Packard Company 4
- Acknowledgements 4
- Safety information 4
- Contents 5
- 1 Get started 11
- Chapter 1 12
- 8 Get started 12
- Understand the printer parts 13
- Printing supplies area 14
- Back view 14
- Use the printer control panel 15
- Control panel display icons 16
- Change printer settings 17
- Select paper 18
- Load paper 20
- Load envelopes 21
- Load cards and photo paper 22
- Load custom-size paper 23
- Insert a memory device 24
- Install the accessories 25
- Install Tray 2 26
- Configure trays 27
- Maintain the printer 29
- Update the printer 29
- Turn the printer off 30
- Restore factory defaults 30
- Print documents 31
- Print brochures 32
- Print brochures (Windows) 33
- Print brochures (Mac OS X) 33
- Print on envelopes 34
- Print photos 35
- Chapter 2 36
- 32 Print 36
- 34 Print 38
- HP ePrint 39
- HP Wireless Direct 39
- 36 Print 40
- 38 Print 42
- View Print Resolutions 43
- 3 Web Services 44
- Set up Web Services 45
- Use Web Services 46
- Printer Apps 47
- Remove Web Services 48
- 4 Work with ink cartridges 49
- 46 Work with ink cartridges 50
- Chapter 4 50
- Replace the ink cartridges 51
- Store printing supplies 52
- 5 Solve a problem 54
- Obtain electronic support 55
- HP support by phone 55
- Chapter 5 56
- 52 Solve a problem 56
- Solve printer problems 57
- The printer prints slowly 58
- Solve printer problems 55 59
- Blank or partial page printed 60
- Print quality troubleshooting 61
- 58 Solve a problem 62
- 60 Solve a problem 64
- Solve paper-feed problems 66
- 64 Solve a problem 68
- Solve memory device problems 69
- Solve wireless problems 70
- Solve wireless problems 67 71
- 68 Solve a problem 72
- 70 Solve a problem 74
- Solve wireless problems 71 75
- After resolving the problems 76
- 74 Solve a problem 78
- Solve network problems 79
- 76 Solve a problem 80
- Printhead maintenance 82
- Calibrate the linefeed 83
- Align the printhead 83
- Reinstall the printhead 84
- Printhead maintenance 81 85
- 82 Solve a problem 86
- Clear jams 88
- Clear jams 85 89
- Avoid paper jams 90
- A Technical information 91
- 88 Technical information 92
- Printer specifications 94
- System requirements 95
- Paper specifications 96
- Set minimum margins 99
- Electrical specifications 101
- Memory device specifications 101
- Memory card specifications 101
- USB flash drives 101
- Appendix A 102
- 98 Technical information 102
- Regulatory information 103
- Notice to users in Korea 104
- Notice to users in Brazil 106
- GS Declaration (Germany) 106
- Notice to users in Canada 107
- Notice to users in Taiwan 107
- Notice to users in Mexico 108
- Notice to users in Japan 108
- Regulatory model number 108
- Paper use 109
- Plastics 109
- Material safety data sheets 109
- Recycling program 109
- 106 Technical information 110
- Power consumption 111
- Chemical Substances 111
- Battery information 111
- Battery disposal in Taiwan 111
- RoHS notices (China only) 112
- Third-party licenses 113
- Third-party licenses 117 121
- B HP supplies and accessories 122
- HP paper 123
- CNetwork setup 124
- Set link speed 125
- View IP settings 125
- Change IP settings 125
- Reset network settings 127
- Before you begin 127
- Change the connection type 130
- Test the wireless connection 131
- Overview of security settings 131
- Mac OS X 133
- D Printer management tools 134
- About cookies 135
- Embedded web server features 135
- Product security features 137
- Wireless authentication 139
- E How do I? 140
- F Errors (Windows) 141
- Replace the ink cartridge 142
- Paper Mismatch 142
- Ink sensor failure 145
- Problem with ink system 145
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