Note: Memory errors appear as XXXXXX XXXX 20X in the upper-left
corner of the screen (X can be a number or letter).
5. Successful completion of POST is attained when there are no errors
detected in the system.
6. If a critical error is encountered, the POST is halted.
Advanced Diagnostics Diskettes
The Advanced Diagnostics program comes in two versions on two diskettes
(packaged together with this book). One diskette, labeled “For Machine
Types 2133, 2155, and 2168,” is for all 486 system boards with 72-pin
memory SIMM sockets. The other, labeled “For Machine Types 2133 and
2155,” is for all other system boards. If in doubt about which kind of board
you are testing, try one diskette in the machine. Only the correct diskette for
the machine will run the Advanced Diagnostics program.
The Advanced Diagnostics program is intended to test only IBM products.
Non-IBM products, prototype cards, or modified options can give false errors
and invalid system responses.
To load a diagnostics diskette:
1. Power off the system unit.
2. Install the correct Advanced Diagnostics diskette in Drive A.
3. Power on the system unit.
4. Do not press F1 when the icon appears.
5. If any POST error(s) appear after POST, make a note of the error(s)
and press the Esc key.
To access diagnostic tests from the SELECT AN OPTION Menu:
1. Select 0 (SYSTEM CHECKOUT) option.
2. At the Installed Devices menu, press (Y), then Enter.
3. The SYSTEM CHECKOUT menu is displayed.
4. Select 0 or 1 from the SYSTEM CHECKOUT menu.
5. Select the device to be tested.
Diagnostic Aids 3-3
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