Power-On Self Test - IBM Personal Computer XT Manual To Operations

Power-On Self Test
The power-on self test (POST) is done each time your
system's power is switched on. The POST takes 13 to
90 seconds, depending on the amount of memory in
your system.
~
1
Turn the Contrast and Brightness controls on
your display or TV fully clockwise.
2
Switch on the power to all attached devices
(printer, TV, etc.).
3
Set the Power switch on the expansion unit (if
attached) to On.
4
Set the Power switch on the system unit to On.
There are normally three responses.
A
An indication of the memory test appears in
the upper-left corner of your screen. The
number should continue to increase until it
equals the amount of memory in your
system.
XXX KB OK
1-16 Installation