HP Vectra XU5 Reference Manual page 67

Power-On Self Test (POST)
Each time the system is powered on or a reset is performed, the POST is executed. The
POST process verifies the basic functionality of the system components and initializes
certain system parameters. The POST performs the tests in the order described in this
chapter.
If the POST is initiated by a soft reset [
and shadow RAM is not cleared. A POST initiated by a hard reset (by pushing the reset
button on the PC control panel) will not count memory.In all other aspects, the POST
executes in the same way following power-on, a hard reset, or a soft reset.
NOTE The POST does not detect the replacement of a hard disk or changes in the size of
the hard disk.
Vectra XU Technical Reference
]+[ ]+[ ], the RAM tests are not executed
CTRL ALT DEL
Power-On Self Tests 67