HP LaserJet Pro 400 M401 User Manual

Solve wireless network problems
NOTE:This section applies to the HP LaserJ et Pro 400 M401dw Printer model only.
Wireless connectivity checklist
●Verify that the network 
cable is not connected.
● Verify that the product and the wireless router ar
e turned on and have power. Also make sure that
the wireless radio in the  product is turned on.
● Verify that the service set identifi
er (SSID) is correct. Print a configuration page to determine the
SSID. If you are not sure the SSID is  correct, run the...

4.Make sure that your computer is working co rrectly. If necessary, restart the computer.
5. Try manually configuring the product from the control panel.
The product does not print, and  the computer has a third-party
firewall installed
1. Update the firewall with the most recent  update available from the manufacturer.
2. If programs request firewall access when you inst all the product or try to print, make sure you
allow the programs to run.
3. Temporarily turn off the firewall, and then install  the...

The wireless network is not functioning
1.Make sure that the network cable is not connected.
2. To verify if the network has lost communication , try connecting other devices to the network.
3. Test network communication by pinging the network.
a. Open a command-line prompt on your computer. For Windows, click  Start, click Run, and
then type  cmd.
b. Type  ping followed by the router IP address.
For Mac OS X, open the Network Utility, and th en supply the IP address in the correct field in
the  Ping...

Reduce interference on a wireless network
The following tips can reduce inte rference in a wireless network:
● Keep the wireless devices away fr
om large metal objects, such as filing cabinets, and other
electromagnetic devices, such as  microwaves and cordless telephones. These objects can disrupt
radio signals.
● Keep the wireless devices away from large masonry 
structures and other building structures. These
objects can absorb radio waves and lower signal strength.
● Position the wireless router in a...

Solve product software problems with Windows
A print driver for the product is not visible in the Printer folder
1.Reinstall the product software.
NOTE: Close any applications that are  running. To close an application that has an icon in the
system tray, right-click the icon, and select  Close or Disable .
2.Try plugging the USB cable into a different USB port on the computer.
An error message was  displayed during the software installation
1.Reinstall the product software.
NOTE: Close any applications...

Windows 7a.Click  Start .
b. Click  Devices and Printers .
c. Right-click the product driver icon, and then select  Printer properties.
d. Click the  Ports tab, and then click  Configure Port.
e. Verify the IP address, and then click  OK or Cancel .
f. If the IP addresses are not the same, delete  the driver, and reinstall the driver using the
correct IP address.
g. Create a new HP TCP/IP port using the correct IP address.
4. Try using the IP address to open the HP Embe dded Web Server in a supported Web...

Solve product software problems with Mac OS X
●The print driver is not listed in the Print & Fax or Print & Scan list
●
The product name does not appear in the produc t list in the Print & Fax or Print & Scan list
●
The print driver does not automati cally set up the selected product in the Print & Fax or Print &
Scan list
●
A print job was not sent to the product that you wanted
●
When connected with a USB cable, the product does  not appear in the Print & Fax or Print & Scan
list after the driver is...

A print job was not sent to the product that you wanted
1.Open the print queue and restart the print job.
2. Another product with the same or  similar name might have received your print job. Print a
configuration page to check the  product name. Verify that the name on the configuration page
matches the produc t name in the Print & Fax  (Print & Scan  in Mac OS X v10.7) list.
When connected with a USB cable,  the product does not appear in
the Print & Fax or Prin t & Scan list after the driver is...

Remove software (Windows)
Windows XP1.Click  Start, and then click  Programs.
2. Click  HP, and then click the product name.
3. Click  Uninstall , and then follow the onscreen instructions to remove the software.
Windows Vista and Windows 7 1.Click  Start, and then click  All Programs.
2. Click  HP, and then click the product name.
3. Click  Uninstall , and then follow the onscreen instructions to remove the software.
ENWW Remove software (Windows)
127 

Remove software (Mac OS X)
You must have administrator rights to remove the software.
1.Disconnect the product from the computer.
2. Open  Applications .
3. Select  Hewlett Packard .
4. Select  HP Uninstaller .
5. Select the product from the list of devices, and then click the  Uninstall button.
6. After the software is uninstalled, re start the computer and empty the Trash.
128 Chapter 5   Solve problems ENWW