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4-6 Chapter 4, Advanced Diagnostics Program
Addendum 108431-001 (11-88) to
Manual No. 108033-003
Memory
The Memory test verifies memory data patterns,
memory addressing, and parity detection for all
system memory.
Keyboard
The Keyboard test verifies the keyboard inter-
face, the individual keys, the LED indicators, the
repeat action key mode, and the security lock
(if applicable).
Parallel Interface
The Parallel Interface test verifies interface data
and control lines, internal loopback control
circuitry, external loopback (if a loopback plug
is attached), and a shifted pattern of standard
printable characters (if a printer is connected).
NOTE: Before selecting this test, be sure you
know which device is set to LPT1 or
LPT2. This is necessary to determine
the applicability of any messages or
error codes that may appear. For more
complete testing of the parallel interface,
attach a loopback plug.
Video
Depending on the devices installed in the
computer being tested, you can run selected
tests or all of the tests listed in Table 4-1. It
details the possible tests for various system video
configurations and indicates the screens that
appear during the tests (assuming only one
video controller is installed).
NOTE: The screens that appear in this section
are provided for reference only and may
vary depending on the type of video
controller or monitor being used.