HP LaserJet 4 Service Manual - Page 282

Interface Troubleshooting This section provides an overview of the printer interface requirements. Refer to Chapter 3 for detailed information about the printer interfaces and configuration. Communications Check Note Communication problems are normally the customer's responsibility. Time spent attempting to resolve these problems may not be covered by the product's Hewlett-Packard warranty. The Customer Service Center (CSC) is available to the customer to help them through these problems. The CSC telephone number is: (208) 323-2551. If the printer is not connected to an MS-DOS-based host, proceed to the Communications Checks table in this section. Test Message After the printer is installed, verify communications between the printer and the IBM-compatible computer. Enter the following at the DOS prompt: C:\DIR>LPT1 [Enter] The printer should print a directory listing of the C:\ directory. If the Communications Check fails, proceed as follows. 7-52 Troubleshooting