Interface troubleshooting

The following sections provide instructions for interface troubleshooting.

Communications checks

NOTE Communication problems are normally the customer's responsibility. Time spent attempting to resolve these problems might not be covered by the Hewlett-Packard product warranty. Refer the customer to the network administrator for assistance in troubleshooting network problems.

If the device is not connected directly to a Windows or MS-DOS-based host, see EIO troubleshooting on page 157.

CAUTION HP LaserJet printers are not designed to work with mechanical switch-box products that don't have correct surge protection. These devices generate high transient voltages that cause permanent damage to the formatter. This circumstance is not covered by the Hewlett- Packard product warranty.

Computer direct connect (parallel) test

After the device is installed, verify communications by bypassing the Windows driver between the device and the IBM-compatible computer. Type the following information at the MS-DOS prompt:

C:\DIR>LPT1 Enter (for printing to parallel port #1)

The device should print a directory listing of the C:\ directory. You might need to press on the control panel to print the data that is in the buffer.

EIO troubleshooting

If the device contains an optional HP Jetdirect print server, and you cannot communicate with the device over the network, verify that the print server is operating. Print a configuration page (see Use information pages on page 38). If the Jetdirect card does not appear under "Installed personalities and options" on the configuration page, reseat or replace the Jetdirect EIO card. See the troubleshooting section of the HP Jetdirect Print Server Software Administrators Guide.

When the HP Jetdirect print server is installed correctly, print a Jetdirect page (this page automatically prints when a Jetdirect print server is installed and a configuration page is printed). See Use information pages on page 38. The Jetdirect page contains valuable network-related information about the device.

The following illustration shows the contents of the Jetdirect page.

ENWW

Interface troubleshooting 157