Service manual

System

Utiliti8s

Performing System Diagnostics

This section describes how to test the operation of your computer and its peripheral devices

using the System diagnostics program on your Reference diskette. Run the diagnostics

program if you are not sure whether a device is performing correctly. The table at the end of

this appendix lists the error messages you may see during testing.

You can test the following devices using System diagnostics:

System board

Numeric coprocessor

System memory

Diskette drive(s)

Hard disk drive(s)

Serial ports

Parallel port(s)

Video adapter

Dot matrix printer(s).

Note When performing diskette and hard disk diagnostics, the Write/Read function checks

may destroy data on the disk Be sure to back up any data on your hard disk or insert

a blank, formatted diskette before you run this test. Also, be sure to do this if you

select Run all above checks.

Epson NX Service

Manual

B-15