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Chapter 4
Performing System Diagnostics
This chapter describes how to check the operation of the main unit and
peripheral devices of your system. You check these devices using System
diagnostics, option 4 on the OPERATION MENU.
Always run diagnostics after adding or removing optional devices, or if
you are unsure whether a device is performing correctly. You should also run
these tests after moving your computer from one place to another, and after
you replace the internal battery.
Note:
To run System diagnostics, boot your system with the reference disk-
ette in drive A. Then select option 4 from the OPERATION
MENU. If you start this program in any other way, some tests may
produce strange results.
You can test these devices; the program identifies each one with a spe-
cific reference number:
1 - System
2 - Memory
3 - Keyboard
4 - Monochrome display adapter and CRT
5 - Color graphics adapter and CRT
6 - Floppy disk drives and controller
7 - Math coprocessor (80287)
9 - Parallel port (printer interface)
11 - Serial port (RS-232C port)
12 - Alternate serial port
14 - Dot-matrix printer
17 - Hard disk drives and controller
21 - Alternate parallel port
81 - Parallel port (on video adapter)
Appendix A lists the error messages that may occur when testing these
devices.
Diagnostics
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