Running The Power-On Self-Test (Post) - IBM 5531 Operator's Manual

Cabling the IBM 5531 Industrial Computer
Running the Power-On Self-Test (POST)
2-8
Operator's Guide
The power-on self-test runs every time you set system power on and tests the base system and
memory. The POST takes between 13 and 90 seconds to run, depending on the amount of
memory installed in the system unit. As the POST is running, the amount of memory already
tested is displayed on the screen. The number increases until it is equal to the amount of
memory installed. If the POST has finished successfully, you will hear one short beep.
1. Adjust the controls on the display for maximum brightness and contrast.
2. Switch on the power to all attached devices (display, printer, and so on).
3. Set the system unit's Power switch to On.
As the POST is running, a series of messages similar to the following example should be
displayed on the screen:
XXX KB OK
Note: If your screen does not look similar to the example, or if nothing appears on the
screen, refer to Chapter 5, "Problem Determination Procedures."