HP Pro 4300 C9H70UT C9H70UT#ABA manual Interface troubleshooting, Communications checks

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 printer is not connected directly to a Windows or MS-DOS-based host, see “EIO
	troubleshooting” on page 255.
CAUTION	HP LaserJet printers are not designed to work with mechanical switch-box products without
	proper surge protection. These devices generate high transient voltages that cause permanent
	damage to the formatter PCA. This circumstance is not covered by the Hewlett-Packard product
	warranty.
	Computer direct connect (parallel) test
	After the printer is installed, verify communications by bypassing the Windows driver between
	the printer and the IBM-compatible computer. Type the following at the MS-DOS prompt:
	C:\DIR>LPT1 Enter (for printing to parallel port #1)
	The printer should print a directory listing of the C: \ directory. You might need to press [GO] on
	the control panel to print the data in the buffer.
	EIO troubleshooting
	If the printer contains an optional HP Jetdirect print server, and you cannot communicate with the
	printer over the network, verify that the print server is operating. Print a configuration page (see
	“Configuration page” on page 241). 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 “Jetdirect page” on page 256. The Jetdirect page contains valuable network related
	information about the printer.
	If the host system and printer are still not communicating, replace the formatter PCA and the
	EIO card and reconfigure the printer.
	The following illustration shows the contents of the Jetdirect page.

Q2431-90912 Chapter 7 Troubleshooting 255